TextView.java revision 8202cd3602b87634eeb8b2729612d96f8dbf9416 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.widget;
18
19import com.android.internal.util.FastMath;
20import com.android.internal.widget.EditableInputConnection;
21
22import org.xmlpull.v1.XmlPullParserException;
23
24import android.R;
25import android.content.ClipData;
26import android.content.ClipData.Item;
27import android.content.ClipboardManager;
28import android.content.Context;
29import android.content.pm.PackageManager;
30import android.content.res.ColorStateList;
31import android.content.res.Resources;
32import android.content.res.TypedArray;
33import android.content.res.XmlResourceParser;
34import android.graphics.Canvas;
35import android.graphics.Color;
36import android.graphics.Paint;
37import android.graphics.Path;
38import android.graphics.Rect;
39import android.graphics.RectF;
40import android.graphics.Typeface;
41import android.graphics.drawable.Drawable;
42import android.inputmethodservice.ExtractEditText;
43import android.net.Uri;
44import android.os.Bundle;
45import android.os.Handler;
46import android.os.Message;
47import android.os.Parcel;
48import android.os.Parcelable;
49import android.os.SystemClock;
50import android.text.BoringLayout;
51import android.text.DynamicLayout;
52import android.text.Editable;
53import android.text.GetChars;
54import android.text.GraphicsOperations;
55import android.text.InputFilter;
56import android.text.InputType;
57import android.text.Layout;
58import android.text.ParcelableSpan;
59import android.text.Selection;
60import android.text.SpanWatcher;
61import android.text.Spannable;
62import android.text.SpannableString;
63import android.text.SpannableStringBuilder;
64import android.text.Spanned;
65import android.text.SpannedString;
66import android.text.StaticLayout;
67import android.text.TextPaint;
68import android.text.TextUtils;
69import android.text.TextWatcher;
70import android.text.method.AllCapsTransformationMethod;
71import android.text.method.ArrowKeyMovementMethod;
72import android.text.method.DateKeyListener;
73import android.text.method.DateTimeKeyListener;
74import android.text.method.DialerKeyListener;
75import android.text.method.DigitsKeyListener;
76import android.text.method.KeyListener;
77import android.text.method.LinkMovementMethod;
78import android.text.method.MetaKeyKeyListener;
79import android.text.method.MovementMethod;
80import android.text.method.PasswordTransformationMethod;
81import android.text.method.SingleLineTransformationMethod;
82import android.text.method.TextKeyListener;
83import android.text.method.TimeKeyListener;
84import android.text.method.TransformationMethod;
85import android.text.method.TransformationMethod2;
86import android.text.method.WordIterator;
87import android.text.style.ClickableSpan;
88import android.text.style.ParagraphStyle;
89import android.text.style.SuggestionSpan;
90import android.text.style.TextAppearanceSpan;
91import android.text.style.URLSpan;
92import android.text.style.UnderlineSpan;
93import android.text.style.UpdateAppearance;
94import android.text.util.Linkify;
95import android.util.AttributeSet;
96import android.util.DisplayMetrics;
97import android.util.FloatMath;
98import android.util.Log;
99import android.util.TypedValue;
100import android.view.ActionMode;
101import android.view.ActionMode.Callback;
102import android.view.ContextMenu;
103import android.view.DragEvent;
104import android.view.Gravity;
105import android.view.HapticFeedbackConstants;
106import android.view.KeyCharacterMap;
107import android.view.KeyEvent;
108import android.view.LayoutInflater;
109import android.view.Menu;
110import android.view.MenuItem;
111import android.view.MotionEvent;
112import android.view.View;
113import android.view.ViewAncestor;
114import android.view.ViewConfiguration;
115import android.view.ViewDebug;
116import android.view.ViewGroup;
117import android.view.ViewGroup.LayoutParams;
118import android.view.ViewParent;
119import android.view.ViewTreeObserver;
120import android.view.WindowManager;
121import android.view.accessibility.AccessibilityEvent;
122import android.view.accessibility.AccessibilityManager;
123import android.view.accessibility.AccessibilityNodeInfo;
124import android.view.animation.AnimationUtils;
125import android.view.inputmethod.BaseInputConnection;
126import android.view.inputmethod.CompletionInfo;
127import android.view.inputmethod.CorrectionInfo;
128import android.view.inputmethod.EditorInfo;
129import android.view.inputmethod.ExtractedText;
130import android.view.inputmethod.ExtractedTextRequest;
131import android.view.inputmethod.InputConnection;
132import android.view.inputmethod.InputMethodManager;
133import android.widget.RemoteViews.RemoteView;
134
135import java.io.IOException;
136import java.lang.ref.WeakReference;
137import java.text.BreakIterator;
138import java.util.ArrayList;
139
140/**
141 * Displays text to the user and optionally allows them to edit it.  A TextView
142 * is a complete text editor, however the basic class is configured to not
143 * allow editing; see {@link EditText} for a subclass that configures the text
144 * view for editing.
145 *
146 * <p>
147 * <b>XML attributes</b>
148 * <p>
149 * See {@link android.R.styleable#TextView TextView Attributes},
150 * {@link android.R.styleable#View View Attributes}
151 *
152 * @attr ref android.R.styleable#TextView_text
153 * @attr ref android.R.styleable#TextView_bufferType
154 * @attr ref android.R.styleable#TextView_hint
155 * @attr ref android.R.styleable#TextView_textColor
156 * @attr ref android.R.styleable#TextView_textColorHighlight
157 * @attr ref android.R.styleable#TextView_textColorHint
158 * @attr ref android.R.styleable#TextView_textAppearance
159 * @attr ref android.R.styleable#TextView_textColorLink
160 * @attr ref android.R.styleable#TextView_textSize
161 * @attr ref android.R.styleable#TextView_textScaleX
162 * @attr ref android.R.styleable#TextView_typeface
163 * @attr ref android.R.styleable#TextView_textStyle
164 * @attr ref android.R.styleable#TextView_cursorVisible
165 * @attr ref android.R.styleable#TextView_maxLines
166 * @attr ref android.R.styleable#TextView_maxHeight
167 * @attr ref android.R.styleable#TextView_lines
168 * @attr ref android.R.styleable#TextView_height
169 * @attr ref android.R.styleable#TextView_minLines
170 * @attr ref android.R.styleable#TextView_minHeight
171 * @attr ref android.R.styleable#TextView_maxEms
172 * @attr ref android.R.styleable#TextView_maxWidth
173 * @attr ref android.R.styleable#TextView_ems
174 * @attr ref android.R.styleable#TextView_width
175 * @attr ref android.R.styleable#TextView_minEms
176 * @attr ref android.R.styleable#TextView_minWidth
177 * @attr ref android.R.styleable#TextView_gravity
178 * @attr ref android.R.styleable#TextView_scrollHorizontally
179 * @attr ref android.R.styleable#TextView_password
180 * @attr ref android.R.styleable#TextView_singleLine
181 * @attr ref android.R.styleable#TextView_selectAllOnFocus
182 * @attr ref android.R.styleable#TextView_includeFontPadding
183 * @attr ref android.R.styleable#TextView_maxLength
184 * @attr ref android.R.styleable#TextView_shadowColor
185 * @attr ref android.R.styleable#TextView_shadowDx
186 * @attr ref android.R.styleable#TextView_shadowDy
187 * @attr ref android.R.styleable#TextView_shadowRadius
188 * @attr ref android.R.styleable#TextView_autoLink
189 * @attr ref android.R.styleable#TextView_linksClickable
190 * @attr ref android.R.styleable#TextView_numeric
191 * @attr ref android.R.styleable#TextView_digits
192 * @attr ref android.R.styleable#TextView_phoneNumber
193 * @attr ref android.R.styleable#TextView_inputMethod
194 * @attr ref android.R.styleable#TextView_capitalize
195 * @attr ref android.R.styleable#TextView_autoText
196 * @attr ref android.R.styleable#TextView_editable
197 * @attr ref android.R.styleable#TextView_freezesText
198 * @attr ref android.R.styleable#TextView_ellipsize
199 * @attr ref android.R.styleable#TextView_drawableTop
200 * @attr ref android.R.styleable#TextView_drawableBottom
201 * @attr ref android.R.styleable#TextView_drawableRight
202 * @attr ref android.R.styleable#TextView_drawableLeft
203 * @attr ref android.R.styleable#TextView_drawablePadding
204 * @attr ref android.R.styleable#TextView_lineSpacingExtra
205 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
206 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
207 * @attr ref android.R.styleable#TextView_inputType
208 * @attr ref android.R.styleable#TextView_imeOptions
209 * @attr ref android.R.styleable#TextView_privateImeOptions
210 * @attr ref android.R.styleable#TextView_imeActionLabel
211 * @attr ref android.R.styleable#TextView_imeActionId
212 * @attr ref android.R.styleable#TextView_editorExtras
213 */
214@RemoteView
215public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
216    static final String LOG_TAG = "TextView";
217    static final boolean DEBUG_EXTRACT = false;
218
219    private static final int PRIORITY = 100;
220    private int mCurrentAlpha = 255;
221
222    final int[] mTempCoords = new int[2];
223    Rect mTempRect;
224
225    private ColorStateList mTextColor;
226    private int mCurTextColor;
227    private ColorStateList mHintTextColor;
228    private ColorStateList mLinkTextColor;
229    private int mCurHintTextColor;
230    private boolean mFreezesText;
231    private boolean mFrozenWithFocus;
232    private boolean mTemporaryDetach;
233    private boolean mDispatchTemporaryDetach;
234
235    private boolean mDiscardNextActionUp = false;
236    private boolean mIgnoreActionUpEvent = false;
237
238    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
239    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
240
241    private float mShadowRadius, mShadowDx, mShadowDy;
242
243    private static final int PREDRAW_NOT_REGISTERED = 0;
244    private static final int PREDRAW_PENDING = 1;
245    private static final int PREDRAW_DONE = 2;
246    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
247
248    private TextUtils.TruncateAt mEllipsize = null;
249
250    // Enum for the "typeface" XML parameter.
251    // TODO: How can we get this from the XML instead of hardcoding it here?
252    private static final int SANS = 1;
253    private static final int SERIF = 2;
254    private static final int MONOSPACE = 3;
255
256    // Bitfield for the "numeric" XML parameter.
257    // TODO: How can we get this from the XML instead of hardcoding it here?
258    private static final int SIGNED = 2;
259    private static final int DECIMAL = 4;
260
261    class Drawables {
262        final Rect mCompoundRect = new Rect();
263        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
264                mDrawableStart, mDrawableEnd;
265        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
266                mDrawableSizeStart, mDrawableSizeEnd;
267        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
268                mDrawableHeightStart, mDrawableHeightEnd;
269        int mDrawablePadding;
270    }
271    private Drawables mDrawables;
272
273    private CharSequence mError;
274    private boolean mErrorWasChanged;
275    private ErrorPopup mPopup;
276    /**
277     * This flag is set if the TextView tries to display an error before it
278     * is attached to the window (so its position is still unknown).
279     * It causes the error to be shown later, when onAttachedToWindow()
280     * is called.
281     */
282    private boolean mShowErrorAfterAttach;
283
284    private CharWrapper mCharWrapper = null;
285
286    private boolean mSelectionMoved = false;
287    private boolean mTouchFocusSelected = false;
288
289    private Marquee mMarquee;
290    private boolean mRestartMarquee;
291
292    private int mMarqueeRepeatLimit = 3;
293
294    class InputContentType {
295        int imeOptions = EditorInfo.IME_NULL;
296        String privateImeOptions;
297        CharSequence imeActionLabel;
298        int imeActionId;
299        Bundle extras;
300        OnEditorActionListener onEditorActionListener;
301        boolean enterDown;
302    }
303    InputContentType mInputContentType;
304
305    class InputMethodState {
306        Rect mCursorRectInWindow = new Rect();
307        RectF mTmpRectF = new RectF();
308        float[] mTmpOffset = new float[2];
309        ExtractedTextRequest mExtracting;
310        final ExtractedText mTmpExtracted = new ExtractedText();
311        int mBatchEditNesting;
312        boolean mCursorChanged;
313        boolean mSelectionModeChanged;
314        boolean mContentChanged;
315        int mChangedStart, mChangedEnd, mChangedDelta;
316    }
317    InputMethodState mInputMethodState;
318
319    private int mTextSelectHandleLeftRes;
320    private int mTextSelectHandleRightRes;
321    private int mTextSelectHandleRes;
322    private int mTextEditPasteWindowLayout, mTextEditSidePasteWindowLayout;
323    private int mTextEditNoPasteWindowLayout, mTextEditSideNoPasteWindowLayout;
324
325    private int mTextEditSuggestionsBottomWindowLayout, mTextEditSuggestionsTopWindowLayout;
326    private int mTextEditSuggestionItemLayout;
327    private SuggestionsPopupWindow mSuggestionsPopupWindow;
328    private SuggestionRangeSpan mSuggestionRangeSpan;
329    private boolean mSuggestionsEnabled = true;
330
331    private int mCursorDrawableRes;
332    private final Drawable[] mCursorDrawable = new Drawable[2];
333    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
334
335    private Drawable mSelectHandleLeft;
336    private Drawable mSelectHandleRight;
337    private Drawable mSelectHandleCenter;
338
339    private float mLastDownPositionX, mLastDownPositionY;
340    private Callback mCustomSelectionActionModeCallback;
341
342    private final int mSquaredTouchSlopDistance;
343    // Set when this TextView gained focus with some text selected. Will start selection mode.
344    private boolean mCreatedWithASelection = false;
345
346    private WordIterator mWordIterator;
347
348    // The alignment to pass to Layout, or null if not resolved.
349    private Layout.Alignment mLayoutAlignment;
350
351    // The default value for mTextAlign.
352    private TextAlign mTextAlign = TextAlign.INHERIT;
353
354    private static enum TextAlign {
355        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
356    }
357
358    private boolean bResolvedDrawables = false;
359
360    /*
361     * Kick-start the font cache for the zygote process (to pay the cost of
362     * initializing freetype for our default font only once).
363     */
364    static {
365        Paint p = new Paint();
366        p.setAntiAlias(true);
367        // We don't care about the result, just the side-effect of measuring.
368        p.measureText("H");
369    }
370
371    /**
372     * Interface definition for a callback to be invoked when an action is
373     * performed on the editor.
374     */
375    public interface OnEditorActionListener {
376        /**
377         * Called when an action is being performed.
378         *
379         * @param v The view that was clicked.
380         * @param actionId Identifier of the action.  This will be either the
381         * identifier you supplied, or {@link EditorInfo#IME_NULL
382         * EditorInfo.IME_NULL} if being called due to the enter key
383         * being pressed.
384         * @param event If triggered by an enter key, this is the event;
385         * otherwise, this is null.
386         * @return Return true if you have consumed the action, else false.
387         */
388        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
389    }
390
391    public TextView(Context context) {
392        this(context, null);
393    }
394
395    public TextView(Context context,
396                    AttributeSet attrs) {
397        this(context, attrs, com.android.internal.R.attr.textViewStyle);
398    }
399
400    @SuppressWarnings("deprecation")
401    public TextView(Context context,
402                    AttributeSet attrs,
403                    int defStyle) {
404        super(context, attrs, defStyle);
405        mText = "";
406
407        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
408        mTextPaint.density = getResources().getDisplayMetrics().density;
409        mTextPaint.setCompatibilityScaling(
410                getResources().getCompatibilityInfo().applicationScale);
411
412        // If we get the paint from the skin, we should set it to left, since
413        // the layout always wants it to be left.
414        // mTextPaint.setTextAlign(Paint.Align.LEFT);
415
416        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
417        mHighlightPaint.setCompatibilityScaling(
418                getResources().getCompatibilityInfo().applicationScale);
419
420        mMovement = getDefaultMovementMethod();
421        mTransformation = null;
422
423        TypedArray a =
424            context.obtainStyledAttributes(
425                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
426
427        int textColorHighlight = 0;
428        ColorStateList textColor = null;
429        ColorStateList textColorHint = null;
430        ColorStateList textColorLink = null;
431        int textSize = 15;
432        int typefaceIndex = -1;
433        int styleIndex = -1;
434        boolean allCaps = false;
435
436        /*
437         * Look the appearance up without checking first if it exists because
438         * almost every TextView has one and it greatly simplifies the logic
439         * to be able to parse the appearance first and then let specific tags
440         * for this View override it.
441         */
442        TypedArray appearance = null;
443        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
444        if (ap != -1) {
445            appearance = context.obtainStyledAttributes(ap,
446                                com.android.internal.R.styleable.
447                                TextAppearance);
448        }
449        if (appearance != null) {
450            int n = appearance.getIndexCount();
451            for (int i = 0; i < n; i++) {
452                int attr = appearance.getIndex(i);
453
454                switch (attr) {
455                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
456                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
457                    break;
458
459                case com.android.internal.R.styleable.TextAppearance_textColor:
460                    textColor = appearance.getColorStateList(attr);
461                    break;
462
463                case com.android.internal.R.styleable.TextAppearance_textColorHint:
464                    textColorHint = appearance.getColorStateList(attr);
465                    break;
466
467                case com.android.internal.R.styleable.TextAppearance_textColorLink:
468                    textColorLink = appearance.getColorStateList(attr);
469                    break;
470
471                case com.android.internal.R.styleable.TextAppearance_textSize:
472                    textSize = appearance.getDimensionPixelSize(attr, textSize);
473                    break;
474
475                case com.android.internal.R.styleable.TextAppearance_typeface:
476                    typefaceIndex = appearance.getInt(attr, -1);
477                    break;
478
479                case com.android.internal.R.styleable.TextAppearance_textStyle:
480                    styleIndex = appearance.getInt(attr, -1);
481                    break;
482
483                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
484                    allCaps = appearance.getBoolean(attr, false);
485                    break;
486                }
487            }
488
489            appearance.recycle();
490        }
491
492        boolean editable = getDefaultEditable();
493        CharSequence inputMethod = null;
494        int numeric = 0;
495        CharSequence digits = null;
496        boolean phone = false;
497        boolean autotext = false;
498        int autocap = -1;
499        int buffertype = 0;
500        boolean selectallonfocus = false;
501        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
502            drawableBottom = null, drawableStart = null, drawableEnd = null;
503        int drawablePadding = 0;
504        int ellipsize = -1;
505        boolean singleLine = false;
506        int maxlength = -1;
507        CharSequence text = "";
508        CharSequence hint = null;
509        int shadowcolor = 0;
510        float dx = 0, dy = 0, r = 0;
511        boolean password = false;
512        int inputType = EditorInfo.TYPE_NULL;
513
514        int n = a.getIndexCount();
515        for (int i = 0; i < n; i++) {
516            int attr = a.getIndex(i);
517
518            switch (attr) {
519            case com.android.internal.R.styleable.TextView_editable:
520                editable = a.getBoolean(attr, editable);
521                break;
522
523            case com.android.internal.R.styleable.TextView_inputMethod:
524                inputMethod = a.getText(attr);
525                break;
526
527            case com.android.internal.R.styleable.TextView_numeric:
528                numeric = a.getInt(attr, numeric);
529                break;
530
531            case com.android.internal.R.styleable.TextView_digits:
532                digits = a.getText(attr);
533                break;
534
535            case com.android.internal.R.styleable.TextView_phoneNumber:
536                phone = a.getBoolean(attr, phone);
537                break;
538
539            case com.android.internal.R.styleable.TextView_autoText:
540                autotext = a.getBoolean(attr, autotext);
541                break;
542
543            case com.android.internal.R.styleable.TextView_capitalize:
544                autocap = a.getInt(attr, autocap);
545                break;
546
547            case com.android.internal.R.styleable.TextView_bufferType:
548                buffertype = a.getInt(attr, buffertype);
549                break;
550
551            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
552                selectallonfocus = a.getBoolean(attr, selectallonfocus);
553                break;
554
555            case com.android.internal.R.styleable.TextView_autoLink:
556                mAutoLinkMask = a.getInt(attr, 0);
557                break;
558
559            case com.android.internal.R.styleable.TextView_linksClickable:
560                mLinksClickable = a.getBoolean(attr, true);
561                break;
562
563            case com.android.internal.R.styleable.TextView_drawableLeft:
564                drawableLeft = a.getDrawable(attr);
565                break;
566
567            case com.android.internal.R.styleable.TextView_drawableTop:
568                drawableTop = a.getDrawable(attr);
569                break;
570
571            case com.android.internal.R.styleable.TextView_drawableRight:
572                drawableRight = a.getDrawable(attr);
573                break;
574
575            case com.android.internal.R.styleable.TextView_drawableBottom:
576                drawableBottom = a.getDrawable(attr);
577                break;
578
579            case com.android.internal.R.styleable.TextView_drawableStart:
580                drawableStart = a.getDrawable(attr);
581                break;
582
583            case com.android.internal.R.styleable.TextView_drawableEnd:
584                drawableEnd = a.getDrawable(attr);
585                break;
586
587            case com.android.internal.R.styleable.TextView_drawablePadding:
588                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
589                break;
590
591            case com.android.internal.R.styleable.TextView_maxLines:
592                setMaxLines(a.getInt(attr, -1));
593                break;
594
595            case com.android.internal.R.styleable.TextView_maxHeight:
596                setMaxHeight(a.getDimensionPixelSize(attr, -1));
597                break;
598
599            case com.android.internal.R.styleable.TextView_lines:
600                setLines(a.getInt(attr, -1));
601                break;
602
603            case com.android.internal.R.styleable.TextView_height:
604                setHeight(a.getDimensionPixelSize(attr, -1));
605                break;
606
607            case com.android.internal.R.styleable.TextView_minLines:
608                setMinLines(a.getInt(attr, -1));
609                break;
610
611            case com.android.internal.R.styleable.TextView_minHeight:
612                setMinHeight(a.getDimensionPixelSize(attr, -1));
613                break;
614
615            case com.android.internal.R.styleable.TextView_maxEms:
616                setMaxEms(a.getInt(attr, -1));
617                break;
618
619            case com.android.internal.R.styleable.TextView_maxWidth:
620                setMaxWidth(a.getDimensionPixelSize(attr, -1));
621                break;
622
623            case com.android.internal.R.styleable.TextView_ems:
624                setEms(a.getInt(attr, -1));
625                break;
626
627            case com.android.internal.R.styleable.TextView_width:
628                setWidth(a.getDimensionPixelSize(attr, -1));
629                break;
630
631            case com.android.internal.R.styleable.TextView_minEms:
632                setMinEms(a.getInt(attr, -1));
633                break;
634
635            case com.android.internal.R.styleable.TextView_minWidth:
636                setMinWidth(a.getDimensionPixelSize(attr, -1));
637                break;
638
639            case com.android.internal.R.styleable.TextView_gravity:
640                setGravity(a.getInt(attr, -1));
641                break;
642
643            case com.android.internal.R.styleable.TextView_hint:
644                hint = a.getText(attr);
645                break;
646
647            case com.android.internal.R.styleable.TextView_text:
648                text = a.getText(attr);
649                break;
650
651            case com.android.internal.R.styleable.TextView_scrollHorizontally:
652                if (a.getBoolean(attr, false)) {
653                    setHorizontallyScrolling(true);
654                }
655                break;
656
657            case com.android.internal.R.styleable.TextView_singleLine:
658                singleLine = a.getBoolean(attr, singleLine);
659                break;
660
661            case com.android.internal.R.styleable.TextView_ellipsize:
662                ellipsize = a.getInt(attr, ellipsize);
663                break;
664
665            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
666                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
667                break;
668
669            case com.android.internal.R.styleable.TextView_includeFontPadding:
670                if (!a.getBoolean(attr, true)) {
671                    setIncludeFontPadding(false);
672                }
673                break;
674
675            case com.android.internal.R.styleable.TextView_cursorVisible:
676                if (!a.getBoolean(attr, true)) {
677                    setCursorVisible(false);
678                }
679                break;
680
681            case com.android.internal.R.styleable.TextView_maxLength:
682                maxlength = a.getInt(attr, -1);
683                break;
684
685            case com.android.internal.R.styleable.TextView_textScaleX:
686                setTextScaleX(a.getFloat(attr, 1.0f));
687                break;
688
689            case com.android.internal.R.styleable.TextView_freezesText:
690                mFreezesText = a.getBoolean(attr, false);
691                break;
692
693            case com.android.internal.R.styleable.TextView_shadowColor:
694                shadowcolor = a.getInt(attr, 0);
695                break;
696
697            case com.android.internal.R.styleable.TextView_shadowDx:
698                dx = a.getFloat(attr, 0);
699                break;
700
701            case com.android.internal.R.styleable.TextView_shadowDy:
702                dy = a.getFloat(attr, 0);
703                break;
704
705            case com.android.internal.R.styleable.TextView_shadowRadius:
706                r = a.getFloat(attr, 0);
707                break;
708
709            case com.android.internal.R.styleable.TextView_enabled:
710                setEnabled(a.getBoolean(attr, isEnabled()));
711                break;
712
713            case com.android.internal.R.styleable.TextView_textColorHighlight:
714                textColorHighlight = a.getColor(attr, textColorHighlight);
715                break;
716
717            case com.android.internal.R.styleable.TextView_textColor:
718                textColor = a.getColorStateList(attr);
719                break;
720
721            case com.android.internal.R.styleable.TextView_textColorHint:
722                textColorHint = a.getColorStateList(attr);
723                break;
724
725            case com.android.internal.R.styleable.TextView_textColorLink:
726                textColorLink = a.getColorStateList(attr);
727                break;
728
729            case com.android.internal.R.styleable.TextView_textSize:
730                textSize = a.getDimensionPixelSize(attr, textSize);
731                break;
732
733            case com.android.internal.R.styleable.TextView_typeface:
734                typefaceIndex = a.getInt(attr, typefaceIndex);
735                break;
736
737            case com.android.internal.R.styleable.TextView_textStyle:
738                styleIndex = a.getInt(attr, styleIndex);
739                break;
740
741            case com.android.internal.R.styleable.TextView_password:
742                password = a.getBoolean(attr, password);
743                break;
744
745            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
746                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
747                break;
748
749            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
750                mSpacingMult = a.getFloat(attr, mSpacingMult);
751                break;
752
753            case com.android.internal.R.styleable.TextView_inputType:
754                inputType = a.getInt(attr, mInputType);
755                break;
756
757            case com.android.internal.R.styleable.TextView_imeOptions:
758                if (mInputContentType == null) {
759                    mInputContentType = new InputContentType();
760                }
761                mInputContentType.imeOptions = a.getInt(attr,
762                        mInputContentType.imeOptions);
763                break;
764
765            case com.android.internal.R.styleable.TextView_imeActionLabel:
766                if (mInputContentType == null) {
767                    mInputContentType = new InputContentType();
768                }
769                mInputContentType.imeActionLabel = a.getText(attr);
770                break;
771
772            case com.android.internal.R.styleable.TextView_imeActionId:
773                if (mInputContentType == null) {
774                    mInputContentType = new InputContentType();
775                }
776                mInputContentType.imeActionId = a.getInt(attr,
777                        mInputContentType.imeActionId);
778                break;
779
780            case com.android.internal.R.styleable.TextView_privateImeOptions:
781                setPrivateImeOptions(a.getString(attr));
782                break;
783
784            case com.android.internal.R.styleable.TextView_editorExtras:
785                try {
786                    setInputExtras(a.getResourceId(attr, 0));
787                } catch (XmlPullParserException e) {
788                    Log.w(LOG_TAG, "Failure reading input extras", e);
789                } catch (IOException e) {
790                    Log.w(LOG_TAG, "Failure reading input extras", e);
791                }
792                break;
793
794            case com.android.internal.R.styleable.TextView_textCursorDrawable:
795                mCursorDrawableRes = a.getResourceId(attr, 0);
796                break;
797
798            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
799                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
800                break;
801
802            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
803                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
804                break;
805
806            case com.android.internal.R.styleable.TextView_textSelectHandle:
807                mTextSelectHandleRes = a.getResourceId(attr, 0);
808                break;
809
810            case com.android.internal.R.styleable.TextView_textEditPasteWindowLayout:
811                mTextEditPasteWindowLayout = a.getResourceId(attr, 0);
812                break;
813
814            case com.android.internal.R.styleable.TextView_textEditNoPasteWindowLayout:
815                mTextEditNoPasteWindowLayout = a.getResourceId(attr, 0);
816                break;
817
818            case com.android.internal.R.styleable.TextView_textEditSidePasteWindowLayout:
819                mTextEditSidePasteWindowLayout = a.getResourceId(attr, 0);
820                break;
821
822            case com.android.internal.R.styleable.TextView_textEditSideNoPasteWindowLayout:
823                mTextEditSideNoPasteWindowLayout = a.getResourceId(attr, 0);
824                break;
825
826            case com.android.internal.R.styleable.TextView_textEditSuggestionsBottomWindowLayout:
827                mTextEditSuggestionsBottomWindowLayout = a.getResourceId(attr, 0);
828                break;
829
830            case com.android.internal.R.styleable.TextView_textEditSuggestionsTopWindowLayout:
831                mTextEditSuggestionsTopWindowLayout = a.getResourceId(attr, 0);
832                break;
833
834            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
835                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
836                break;
837
838            case com.android.internal.R.styleable.TextView_textIsSelectable:
839                mTextIsSelectable = a.getBoolean(attr, false);
840                break;
841
842            case com.android.internal.R.styleable.TextView_suggestionsEnabled:
843                mSuggestionsEnabled = a.getBoolean(attr, true);
844                break;
845
846            case com.android.internal.R.styleable.TextView_textAllCaps:
847                allCaps = a.getBoolean(attr, false);
848                break;
849            }
850        }
851        a.recycle();
852
853        BufferType bufferType = BufferType.EDITABLE;
854
855        final int variation =
856                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
857        final boolean passwordInputType = variation
858                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
859        final boolean webPasswordInputType = variation
860                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
861        final boolean numberPasswordInputType = variation
862                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
863
864        if (inputMethod != null) {
865            Class<?> c;
866
867            try {
868                c = Class.forName(inputMethod.toString());
869            } catch (ClassNotFoundException ex) {
870                throw new RuntimeException(ex);
871            }
872
873            try {
874                mInput = (KeyListener) c.newInstance();
875            } catch (InstantiationException ex) {
876                throw new RuntimeException(ex);
877            } catch (IllegalAccessException ex) {
878                throw new RuntimeException(ex);
879            }
880            try {
881                mInputType = inputType != EditorInfo.TYPE_NULL
882                        ? inputType
883                        : mInput.getInputType();
884            } catch (IncompatibleClassChangeError e) {
885                mInputType = EditorInfo.TYPE_CLASS_TEXT;
886            }
887        } else if (digits != null) {
888            mInput = DigitsKeyListener.getInstance(digits.toString());
889            // If no input type was specified, we will default to generic
890            // text, since we can't tell the IME about the set of digits
891            // that was selected.
892            mInputType = inputType != EditorInfo.TYPE_NULL
893                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
894        } else if (inputType != EditorInfo.TYPE_NULL) {
895            setInputType(inputType, true);
896            // If set, the input type overrides what was set using the deprecated singleLine flag.
897            singleLine = !isMultilineInputType(inputType);
898        } else if (phone) {
899            mInput = DialerKeyListener.getInstance();
900            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
901        } else if (numeric != 0) {
902            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
903                                                   (numeric & DECIMAL) != 0);
904            inputType = EditorInfo.TYPE_CLASS_NUMBER;
905            if ((numeric & SIGNED) != 0) {
906                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
907            }
908            if ((numeric & DECIMAL) != 0) {
909                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
910            }
911            mInputType = inputType;
912        } else if (autotext || autocap != -1) {
913            TextKeyListener.Capitalize cap;
914
915            inputType = EditorInfo.TYPE_CLASS_TEXT;
916
917            switch (autocap) {
918            case 1:
919                cap = TextKeyListener.Capitalize.SENTENCES;
920                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
921                break;
922
923            case 2:
924                cap = TextKeyListener.Capitalize.WORDS;
925                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
926                break;
927
928            case 3:
929                cap = TextKeyListener.Capitalize.CHARACTERS;
930                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
931                break;
932
933            default:
934                cap = TextKeyListener.Capitalize.NONE;
935                break;
936            }
937
938            mInput = TextKeyListener.getInstance(autotext, cap);
939            mInputType = inputType;
940        } else if (mTextIsSelectable) {
941            // Prevent text changes from keyboard.
942            mInputType = EditorInfo.TYPE_NULL;
943            mInput = null;
944            bufferType = BufferType.SPANNABLE;
945            // Required to request focus while in touch mode.
946            setFocusableInTouchMode(true);
947            // So that selection can be changed using arrow keys and touch is handled.
948            setMovementMethod(ArrowKeyMovementMethod.getInstance());
949        } else if (editable) {
950            mInput = TextKeyListener.getInstance();
951            mInputType = EditorInfo.TYPE_CLASS_TEXT;
952        } else {
953            mInput = null;
954
955            switch (buffertype) {
956                case 0:
957                    bufferType = BufferType.NORMAL;
958                    break;
959                case 1:
960                    bufferType = BufferType.SPANNABLE;
961                    break;
962                case 2:
963                    bufferType = BufferType.EDITABLE;
964                    break;
965            }
966        }
967
968        // mInputType has been set from inputType, possibly modified by mInputMethod.
969        // Specialize mInputType to [web]password if we have a text class and the original input
970        // type was a password.
971        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
972            if (password || passwordInputType) {
973                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
974                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
975            }
976            if (webPasswordInputType) {
977                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
978                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
979            }
980        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
981            if (numberPasswordInputType) {
982                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
983                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
984            }
985        }
986
987        if (selectallonfocus) {
988            mSelectAllOnFocus = true;
989
990            if (bufferType == BufferType.NORMAL)
991                bufferType = BufferType.SPANNABLE;
992        }
993
994        setCompoundDrawablesWithIntrinsicBounds(
995            drawableLeft, drawableTop, drawableRight, drawableBottom);
996        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
997        setCompoundDrawablePadding(drawablePadding);
998
999        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1000        // of lines of height are unchanged for multi-line TextViews.
1001        setInputTypeSingleLine(singleLine);
1002        applySingleLine(singleLine, singleLine, singleLine);
1003
1004        if (singleLine && mInput == null && ellipsize < 0) {
1005                ellipsize = 3; // END
1006        }
1007
1008        switch (ellipsize) {
1009            case 1:
1010                setEllipsize(TextUtils.TruncateAt.START);
1011                break;
1012            case 2:
1013                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1014                break;
1015            case 3:
1016                setEllipsize(TextUtils.TruncateAt.END);
1017                break;
1018            case 4:
1019                setHorizontalFadingEdgeEnabled(true);
1020                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1021                break;
1022        }
1023
1024        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1025        setHintTextColor(textColorHint);
1026        setLinkTextColor(textColorLink);
1027        if (textColorHighlight != 0) {
1028            setHighlightColor(textColorHighlight);
1029        }
1030        setRawTextSize(textSize);
1031
1032        if (allCaps) {
1033            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1034        }
1035
1036        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1037            setTransformationMethod(PasswordTransformationMethod.getInstance());
1038            typefaceIndex = MONOSPACE;
1039        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1040                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1041            typefaceIndex = MONOSPACE;
1042        }
1043
1044        setTypefaceByIndex(typefaceIndex, styleIndex);
1045
1046        if (shadowcolor != 0) {
1047            setShadowLayer(r, dx, dy, shadowcolor);
1048        }
1049
1050        if (maxlength >= 0) {
1051            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1052        } else {
1053            setFilters(NO_FILTERS);
1054        }
1055
1056        setText(text, bufferType);
1057        if (hint != null) setHint(hint);
1058
1059        /*
1060         * Views are not normally focusable unless specified to be.
1061         * However, TextViews that have input or movement methods *are*
1062         * focusable by default.
1063         */
1064        a = context.obtainStyledAttributes(attrs,
1065                                           com.android.internal.R.styleable.View,
1066                                           defStyle, 0);
1067
1068        boolean focusable = mMovement != null || mInput != null;
1069        boolean clickable = focusable;
1070        boolean longClickable = focusable;
1071
1072        n = a.getIndexCount();
1073        for (int i = 0; i < n; i++) {
1074            int attr = a.getIndex(i);
1075
1076            switch (attr) {
1077            case com.android.internal.R.styleable.View_focusable:
1078                focusable = a.getBoolean(attr, focusable);
1079                break;
1080
1081            case com.android.internal.R.styleable.View_clickable:
1082                clickable = a.getBoolean(attr, clickable);
1083                break;
1084
1085            case com.android.internal.R.styleable.View_longClickable:
1086                longClickable = a.getBoolean(attr, longClickable);
1087                break;
1088            }
1089        }
1090        a.recycle();
1091
1092        setFocusable(focusable);
1093        setClickable(clickable);
1094        setLongClickable(longClickable);
1095
1096        prepareCursorControllers();
1097
1098        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1099        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1100        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1101    }
1102
1103    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1104        Typeface tf = null;
1105        switch (typefaceIndex) {
1106            case SANS:
1107                tf = Typeface.SANS_SERIF;
1108                break;
1109
1110            case SERIF:
1111                tf = Typeface.SERIF;
1112                break;
1113
1114            case MONOSPACE:
1115                tf = Typeface.MONOSPACE;
1116                break;
1117        }
1118
1119        setTypeface(tf, styleIndex);
1120    }
1121
1122    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1123        boolean hasRelativeDrawables = (start != null) || (end != null);
1124        if (hasRelativeDrawables) {
1125            Drawables dr = mDrawables;
1126            if (dr == null) {
1127                mDrawables = dr = new Drawables();
1128            }
1129            final Rect compoundRect = dr.mCompoundRect;
1130            int[] state = getDrawableState();
1131            if (start != null) {
1132                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1133                start.setState(state);
1134                start.copyBounds(compoundRect);
1135                start.setCallback(this);
1136
1137                dr.mDrawableStart = start;
1138                dr.mDrawableSizeStart = compoundRect.width();
1139                dr.mDrawableHeightStart = compoundRect.height();
1140            } else {
1141                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1142            }
1143            if (end != null) {
1144                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1145                end.setState(state);
1146                end.copyBounds(compoundRect);
1147                end.setCallback(this);
1148
1149                dr.mDrawableEnd = end;
1150                dr.mDrawableSizeEnd = compoundRect.width();
1151                dr.mDrawableHeightEnd = compoundRect.height();
1152            } else {
1153                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1154            }
1155        }
1156    }
1157
1158    @Override
1159    public void setEnabled(boolean enabled) {
1160        if (enabled == isEnabled()) {
1161            return;
1162        }
1163
1164        if (!enabled) {
1165            // Hide the soft input if the currently active TextView is disabled
1166            InputMethodManager imm = InputMethodManager.peekInstance();
1167            if (imm != null && imm.isActive(this)) {
1168                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1169            }
1170        }
1171        super.setEnabled(enabled);
1172        prepareCursorControllers();
1173    }
1174
1175    /**
1176     * Sets the typeface and style in which the text should be displayed,
1177     * and turns on the fake bold and italic bits in the Paint if the
1178     * Typeface that you provided does not have all the bits in the
1179     * style that you specified.
1180     *
1181     * @attr ref android.R.styleable#TextView_typeface
1182     * @attr ref android.R.styleable#TextView_textStyle
1183     */
1184    public void setTypeface(Typeface tf, int style) {
1185        if (style > 0) {
1186            if (tf == null) {
1187                tf = Typeface.defaultFromStyle(style);
1188            } else {
1189                tf = Typeface.create(tf, style);
1190            }
1191
1192            setTypeface(tf);
1193            // now compute what (if any) algorithmic styling is needed
1194            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1195            int need = style & ~typefaceStyle;
1196            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1197            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1198        } else {
1199            mTextPaint.setFakeBoldText(false);
1200            mTextPaint.setTextSkewX(0);
1201            setTypeface(tf);
1202        }
1203    }
1204
1205    /**
1206     * Subclasses override this to specify that they have a KeyListener
1207     * by default even if not specifically called for in the XML options.
1208     */
1209    protected boolean getDefaultEditable() {
1210        return false;
1211    }
1212
1213    /**
1214     * Subclasses override this to specify a default movement method.
1215     */
1216    protected MovementMethod getDefaultMovementMethod() {
1217        return null;
1218    }
1219
1220    /**
1221     * Return the text the TextView is displaying. If setText() was called with
1222     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1223     * the return value from this method to Spannable or Editable, respectively.
1224     *
1225     * Note: The content of the return value should not be modified. If you want
1226     * a modifiable one, you should make your own copy first.
1227     */
1228    @ViewDebug.CapturedViewProperty
1229    public CharSequence getText() {
1230        return mText;
1231    }
1232
1233    /**
1234     * Returns the length, in characters, of the text managed by this TextView
1235     */
1236    public int length() {
1237        return mText.length();
1238    }
1239
1240    /**
1241     * Return the text the TextView is displaying as an Editable object.  If
1242     * the text is not editable, null is returned.
1243     *
1244     * @see #getText
1245     */
1246    public Editable getEditableText() {
1247        return (mText instanceof Editable) ? (Editable)mText : null;
1248    }
1249
1250    /**
1251     * @return the height of one standard line in pixels.  Note that markup
1252     * within the text can cause individual lines to be taller or shorter
1253     * than this height, and the layout may contain additional first-
1254     * or last-line padding.
1255     */
1256    public int getLineHeight() {
1257        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1258    }
1259
1260    /**
1261     * @return the Layout that is currently being used to display the text.
1262     * This can be null if the text or width has recently changes.
1263     */
1264    public final Layout getLayout() {
1265        return mLayout;
1266    }
1267
1268    /**
1269     * @return the current key listener for this TextView.
1270     * This will frequently be null for non-EditText TextViews.
1271     */
1272    public final KeyListener getKeyListener() {
1273        return mInput;
1274    }
1275
1276    /**
1277     * Sets the key listener to be used with this TextView.  This can be null
1278     * to disallow user input.  Note that this method has significant and
1279     * subtle interactions with soft keyboards and other input method:
1280     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1281     * for important details.  Calling this method will replace the current
1282     * content type of the text view with the content type returned by the
1283     * key listener.
1284     * <p>
1285     * Be warned that if you want a TextView with a key listener or movement
1286     * method not to be focusable, or if you want a TextView without a
1287     * key listener or movement method to be focusable, you must call
1288     * {@link #setFocusable} again after calling this to get the focusability
1289     * back the way you want it.
1290     *
1291     * @attr ref android.R.styleable#TextView_numeric
1292     * @attr ref android.R.styleable#TextView_digits
1293     * @attr ref android.R.styleable#TextView_phoneNumber
1294     * @attr ref android.R.styleable#TextView_inputMethod
1295     * @attr ref android.R.styleable#TextView_capitalize
1296     * @attr ref android.R.styleable#TextView_autoText
1297     */
1298    public void setKeyListener(KeyListener input) {
1299        setKeyListenerOnly(input);
1300        fixFocusableAndClickableSettings();
1301
1302        if (input != null) {
1303            try {
1304                mInputType = mInput.getInputType();
1305            } catch (IncompatibleClassChangeError e) {
1306                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1307            }
1308            // Change inputType, without affecting transformation.
1309            // No need to applySingleLine since mSingleLine is unchanged.
1310            setInputTypeSingleLine(mSingleLine);
1311        } else {
1312            mInputType = EditorInfo.TYPE_NULL;
1313        }
1314
1315        InputMethodManager imm = InputMethodManager.peekInstance();
1316        if (imm != null) imm.restartInput(this);
1317    }
1318
1319    private void setKeyListenerOnly(KeyListener input) {
1320        mInput = input;
1321        if (mInput != null && !(mText instanceof Editable))
1322            setText(mText);
1323
1324        setFilters((Editable) mText, mFilters);
1325    }
1326
1327    /**
1328     * @return the movement method being used for this TextView.
1329     * This will frequently be null for non-EditText TextViews.
1330     */
1331    public final MovementMethod getMovementMethod() {
1332        return mMovement;
1333    }
1334
1335    /**
1336     * Sets the movement method (arrow key handler) to be used for
1337     * this TextView.  This can be null to disallow using the arrow keys
1338     * to move the cursor or scroll the view.
1339     * <p>
1340     * Be warned that if you want a TextView with a key listener or movement
1341     * method not to be focusable, or if you want a TextView without a
1342     * key listener or movement method to be focusable, you must call
1343     * {@link #setFocusable} again after calling this to get the focusability
1344     * back the way you want it.
1345     */
1346    public final void setMovementMethod(MovementMethod movement) {
1347        mMovement = movement;
1348
1349        if (mMovement != null && !(mText instanceof Spannable))
1350            setText(mText);
1351
1352        fixFocusableAndClickableSettings();
1353
1354        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1355        prepareCursorControllers();
1356    }
1357
1358    private void fixFocusableAndClickableSettings() {
1359        if ((mMovement != null) || mInput != null) {
1360            setFocusable(true);
1361            setClickable(true);
1362            setLongClickable(true);
1363        } else {
1364            setFocusable(false);
1365            setClickable(false);
1366            setLongClickable(false);
1367        }
1368    }
1369
1370    /**
1371     * @return the current transformation method for this TextView.
1372     * This will frequently be null except for single-line and password
1373     * fields.
1374     */
1375    public final TransformationMethod getTransformationMethod() {
1376        return mTransformation;
1377    }
1378
1379    /**
1380     * Sets the transformation that is applied to the text that this
1381     * TextView is displaying.
1382     *
1383     * @attr ref android.R.styleable#TextView_password
1384     * @attr ref android.R.styleable#TextView_singleLine
1385     */
1386    public final void setTransformationMethod(TransformationMethod method) {
1387        if (method == mTransformation) {
1388            // Avoid the setText() below if the transformation is
1389            // the same.
1390            return;
1391        }
1392        if (mTransformation != null) {
1393            if (mText instanceof Spannable) {
1394                ((Spannable) mText).removeSpan(mTransformation);
1395            }
1396        }
1397
1398        mTransformation = method;
1399
1400        if (method instanceof TransformationMethod2) {
1401            TransformationMethod2 method2 = (TransformationMethod2) method;
1402            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1403            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1404        } else {
1405            mAllowTransformationLengthChange = false;
1406        }
1407
1408        setText(mText);
1409    }
1410
1411    /**
1412     * Returns the top padding of the view, plus space for the top
1413     * Drawable if any.
1414     */
1415    public int getCompoundPaddingTop() {
1416        final Drawables dr = mDrawables;
1417        if (dr == null || dr.mDrawableTop == null) {
1418            return mPaddingTop;
1419        } else {
1420            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1421        }
1422    }
1423
1424    /**
1425     * Returns the bottom padding of the view, plus space for the bottom
1426     * Drawable if any.
1427     */
1428    public int getCompoundPaddingBottom() {
1429        final Drawables dr = mDrawables;
1430        if (dr == null || dr.mDrawableBottom == null) {
1431            return mPaddingBottom;
1432        } else {
1433            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1434        }
1435    }
1436
1437    /**
1438     * Returns the left padding of the view, plus space for the left
1439     * Drawable if any.
1440     */
1441    public int getCompoundPaddingLeft() {
1442        final Drawables dr = mDrawables;
1443        if (dr == null || dr.mDrawableLeft == null) {
1444            return mPaddingLeft;
1445        } else {
1446            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1447        }
1448    }
1449
1450    /**
1451     * Returns the right padding of the view, plus space for the right
1452     * Drawable if any.
1453     */
1454    public int getCompoundPaddingRight() {
1455        final Drawables dr = mDrawables;
1456        if (dr == null || dr.mDrawableRight == null) {
1457            return mPaddingRight;
1458        } else {
1459            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1460        }
1461    }
1462
1463    /**
1464     * Returns the start padding of the view, plus space for the start
1465     * Drawable if any.
1466     *
1467     * @hide
1468     */
1469    public int getCompoundPaddingStart() {
1470        resolveDrawables();
1471        switch(getResolvedLayoutDirection()) {
1472            default:
1473            case LAYOUT_DIRECTION_LTR:
1474                return getCompoundPaddingLeft();
1475            case LAYOUT_DIRECTION_RTL:
1476                return getCompoundPaddingRight();
1477        }
1478    }
1479
1480    /**
1481     * Returns the end padding of the view, plus space for the end
1482     * Drawable if any.
1483     *
1484     * @hide
1485     */
1486    public int getCompoundPaddingEnd() {
1487        resolveDrawables();
1488        switch(getResolvedLayoutDirection()) {
1489            default:
1490            case LAYOUT_DIRECTION_LTR:
1491                return getCompoundPaddingRight();
1492            case LAYOUT_DIRECTION_RTL:
1493                return getCompoundPaddingLeft();
1494        }
1495    }
1496
1497    /**
1498     * Returns the extended top padding of the view, including both the
1499     * top Drawable if any and any extra space to keep more than maxLines
1500     * of text from showing.  It is only valid to call this after measuring.
1501     */
1502    public int getExtendedPaddingTop() {
1503        if (mMaxMode != LINES) {
1504            return getCompoundPaddingTop();
1505        }
1506
1507        if (mLayout.getLineCount() <= mMaximum) {
1508            return getCompoundPaddingTop();
1509        }
1510
1511        int top = getCompoundPaddingTop();
1512        int bottom = getCompoundPaddingBottom();
1513        int viewht = getHeight() - top - bottom;
1514        int layoutht = mLayout.getLineTop(mMaximum);
1515
1516        if (layoutht >= viewht) {
1517            return top;
1518        }
1519
1520        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1521        if (gravity == Gravity.TOP) {
1522            return top;
1523        } else if (gravity == Gravity.BOTTOM) {
1524            return top + viewht - layoutht;
1525        } else { // (gravity == Gravity.CENTER_VERTICAL)
1526            return top + (viewht - layoutht) / 2;
1527        }
1528    }
1529
1530    /**
1531     * Returns the extended bottom padding of the view, including both the
1532     * bottom Drawable if any and any extra space to keep more than maxLines
1533     * of text from showing.  It is only valid to call this after measuring.
1534     */
1535    public int getExtendedPaddingBottom() {
1536        if (mMaxMode != LINES) {
1537            return getCompoundPaddingBottom();
1538        }
1539
1540        if (mLayout.getLineCount() <= mMaximum) {
1541            return getCompoundPaddingBottom();
1542        }
1543
1544        int top = getCompoundPaddingTop();
1545        int bottom = getCompoundPaddingBottom();
1546        int viewht = getHeight() - top - bottom;
1547        int layoutht = mLayout.getLineTop(mMaximum);
1548
1549        if (layoutht >= viewht) {
1550            return bottom;
1551        }
1552
1553        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1554        if (gravity == Gravity.TOP) {
1555            return bottom + viewht - layoutht;
1556        } else if (gravity == Gravity.BOTTOM) {
1557            return bottom;
1558        } else { // (gravity == Gravity.CENTER_VERTICAL)
1559            return bottom + (viewht - layoutht) / 2;
1560        }
1561    }
1562
1563    /**
1564     * Returns the total left padding of the view, including the left
1565     * Drawable if any.
1566     */
1567    public int getTotalPaddingLeft() {
1568        return getCompoundPaddingLeft();
1569    }
1570
1571    /**
1572     * Returns the total right padding of the view, including the right
1573     * Drawable if any.
1574     */
1575    public int getTotalPaddingRight() {
1576        return getCompoundPaddingRight();
1577    }
1578
1579    /**
1580     * Returns the total start padding of the view, including the start
1581     * Drawable if any.
1582     *
1583     * @hide
1584     */
1585    public int getTotalPaddingStart() {
1586        return getCompoundPaddingStart();
1587    }
1588
1589    /**
1590     * Returns the total end padding of the view, including the end
1591     * Drawable if any.
1592     *
1593     * @hide
1594     */
1595    public int getTotalPaddingEnd() {
1596        return getCompoundPaddingEnd();
1597    }
1598
1599    /**
1600     * Returns the total top padding of the view, including the top
1601     * Drawable if any, the extra space to keep more than maxLines
1602     * from showing, and the vertical offset for gravity, if any.
1603     */
1604    public int getTotalPaddingTop() {
1605        return getExtendedPaddingTop() + getVerticalOffset(true);
1606    }
1607
1608    /**
1609     * Returns the total bottom padding of the view, including the bottom
1610     * Drawable if any, the extra space to keep more than maxLines
1611     * from showing, and the vertical offset for gravity, if any.
1612     */
1613    public int getTotalPaddingBottom() {
1614        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1615    }
1616
1617    /**
1618     * Sets the Drawables (if any) to appear to the left of, above,
1619     * to the right of, and below the text.  Use null if you do not
1620     * want a Drawable there.  The Drawables must already have had
1621     * {@link Drawable#setBounds} called.
1622     *
1623     * @attr ref android.R.styleable#TextView_drawableLeft
1624     * @attr ref android.R.styleable#TextView_drawableTop
1625     * @attr ref android.R.styleable#TextView_drawableRight
1626     * @attr ref android.R.styleable#TextView_drawableBottom
1627     */
1628    public void setCompoundDrawables(Drawable left, Drawable top,
1629                                     Drawable right, Drawable bottom) {
1630        Drawables dr = mDrawables;
1631
1632        final boolean drawables = left != null || top != null
1633                || right != null || bottom != null;
1634
1635        if (!drawables) {
1636            // Clearing drawables...  can we free the data structure?
1637            if (dr != null) {
1638                if (dr.mDrawablePadding == 0) {
1639                    mDrawables = null;
1640                } else {
1641                    // We need to retain the last set padding, so just clear
1642                    // out all of the fields in the existing structure.
1643                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1644                    dr.mDrawableLeft = null;
1645                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1646                    dr.mDrawableTop = null;
1647                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1648                    dr.mDrawableRight = null;
1649                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1650                    dr.mDrawableBottom = null;
1651                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1652                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1653                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1654                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1655                }
1656            }
1657        } else {
1658            if (dr == null) {
1659                mDrawables = dr = new Drawables();
1660            }
1661
1662            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1663                dr.mDrawableLeft.setCallback(null);
1664            }
1665            dr.mDrawableLeft = left;
1666
1667            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1668                dr.mDrawableTop.setCallback(null);
1669            }
1670            dr.mDrawableTop = top;
1671
1672            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1673                dr.mDrawableRight.setCallback(null);
1674            }
1675            dr.mDrawableRight = right;
1676
1677            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1678                dr.mDrawableBottom.setCallback(null);
1679            }
1680            dr.mDrawableBottom = bottom;
1681
1682            final Rect compoundRect = dr.mCompoundRect;
1683            int[] state;
1684
1685            state = getDrawableState();
1686
1687            if (left != null) {
1688                left.setState(state);
1689                left.copyBounds(compoundRect);
1690                left.setCallback(this);
1691                dr.mDrawableSizeLeft = compoundRect.width();
1692                dr.mDrawableHeightLeft = compoundRect.height();
1693            } else {
1694                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1695            }
1696
1697            if (right != null) {
1698                right.setState(state);
1699                right.copyBounds(compoundRect);
1700                right.setCallback(this);
1701                dr.mDrawableSizeRight = compoundRect.width();
1702                dr.mDrawableHeightRight = compoundRect.height();
1703            } else {
1704                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1705            }
1706
1707            if (top != null) {
1708                top.setState(state);
1709                top.copyBounds(compoundRect);
1710                top.setCallback(this);
1711                dr.mDrawableSizeTop = compoundRect.height();
1712                dr.mDrawableWidthTop = compoundRect.width();
1713            } else {
1714                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1715            }
1716
1717            if (bottom != null) {
1718                bottom.setState(state);
1719                bottom.copyBounds(compoundRect);
1720                bottom.setCallback(this);
1721                dr.mDrawableSizeBottom = compoundRect.height();
1722                dr.mDrawableWidthBottom = compoundRect.width();
1723            } else {
1724                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1725            }
1726        }
1727
1728        invalidate();
1729        requestLayout();
1730    }
1731
1732    /**
1733     * Sets the Drawables (if any) to appear to the left of, above,
1734     * to the right of, and below the text.  Use 0 if you do not
1735     * want a Drawable there. The Drawables' bounds will be set to
1736     * their intrinsic bounds.
1737     *
1738     * @param left Resource identifier of the left Drawable.
1739     * @param top Resource identifier of the top Drawable.
1740     * @param right Resource identifier of the right Drawable.
1741     * @param bottom Resource identifier of the bottom Drawable.
1742     *
1743     * @attr ref android.R.styleable#TextView_drawableLeft
1744     * @attr ref android.R.styleable#TextView_drawableTop
1745     * @attr ref android.R.styleable#TextView_drawableRight
1746     * @attr ref android.R.styleable#TextView_drawableBottom
1747     */
1748    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1749        final Resources resources = getContext().getResources();
1750        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1751                top != 0 ? resources.getDrawable(top) : null,
1752                right != 0 ? resources.getDrawable(right) : null,
1753                bottom != 0 ? resources.getDrawable(bottom) : null);
1754    }
1755
1756    /**
1757     * Sets the Drawables (if any) to appear to the left of, above,
1758     * to the right of, and below the text.  Use null if you do not
1759     * want a Drawable there. The Drawables' bounds will be set to
1760     * their intrinsic bounds.
1761     *
1762     * @attr ref android.R.styleable#TextView_drawableLeft
1763     * @attr ref android.R.styleable#TextView_drawableTop
1764     * @attr ref android.R.styleable#TextView_drawableRight
1765     * @attr ref android.R.styleable#TextView_drawableBottom
1766     */
1767    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1768            Drawable right, Drawable bottom) {
1769
1770        if (left != null) {
1771            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1772        }
1773        if (right != null) {
1774            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1775        }
1776        if (top != null) {
1777            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1778        }
1779        if (bottom != null) {
1780            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1781        }
1782        setCompoundDrawables(left, top, right, bottom);
1783    }
1784
1785    /**
1786     * Sets the Drawables (if any) to appear to the start of, above,
1787     * to the end of, and below the text.  Use null if you do not
1788     * want a Drawable there.  The Drawables must already have had
1789     * {@link Drawable#setBounds} called.
1790     *
1791     * @attr ref android.R.styleable#TextView_drawableStart
1792     * @attr ref android.R.styleable#TextView_drawableTop
1793     * @attr ref android.R.styleable#TextView_drawableEnd
1794     * @attr ref android.R.styleable#TextView_drawableBottom
1795     *
1796     * @hide
1797     */
1798    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1799                                     Drawable end, Drawable bottom) {
1800        Drawables dr = mDrawables;
1801
1802        final boolean drawables = start != null || top != null
1803                || end != null || bottom != null;
1804
1805        if (!drawables) {
1806            // Clearing drawables...  can we free the data structure?
1807            if (dr != null) {
1808                if (dr.mDrawablePadding == 0) {
1809                    mDrawables = null;
1810                } else {
1811                    // We need to retain the last set padding, so just clear
1812                    // out all of the fields in the existing structure.
1813                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1814                    dr.mDrawableStart = null;
1815                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1816                    dr.mDrawableTop = null;
1817                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1818                    dr.mDrawableEnd = null;
1819                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1820                    dr.mDrawableBottom = null;
1821                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1822                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1823                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1824                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1825                }
1826            }
1827        } else {
1828            if (dr == null) {
1829                mDrawables = dr = new Drawables();
1830            }
1831
1832            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1833                dr.mDrawableStart.setCallback(null);
1834            }
1835            dr.mDrawableStart = start;
1836
1837            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1838                dr.mDrawableTop.setCallback(null);
1839            }
1840            dr.mDrawableTop = top;
1841
1842            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1843                dr.mDrawableEnd.setCallback(null);
1844            }
1845            dr.mDrawableEnd = end;
1846
1847            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1848                dr.mDrawableBottom.setCallback(null);
1849            }
1850            dr.mDrawableBottom = bottom;
1851
1852            final Rect compoundRect = dr.mCompoundRect;
1853            int[] state;
1854
1855            state = getDrawableState();
1856
1857            if (start != null) {
1858                start.setState(state);
1859                start.copyBounds(compoundRect);
1860                start.setCallback(this);
1861                dr.mDrawableSizeStart = compoundRect.width();
1862                dr.mDrawableHeightStart = compoundRect.height();
1863            } else {
1864                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1865            }
1866
1867            if (end != null) {
1868                end.setState(state);
1869                end.copyBounds(compoundRect);
1870                end.setCallback(this);
1871                dr.mDrawableSizeEnd = compoundRect.width();
1872                dr.mDrawableHeightEnd = compoundRect.height();
1873            } else {
1874                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1875            }
1876
1877            if (top != null) {
1878                top.setState(state);
1879                top.copyBounds(compoundRect);
1880                top.setCallback(this);
1881                dr.mDrawableSizeTop = compoundRect.height();
1882                dr.mDrawableWidthTop = compoundRect.width();
1883            } else {
1884                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1885            }
1886
1887            if (bottom != null) {
1888                bottom.setState(state);
1889                bottom.copyBounds(compoundRect);
1890                bottom.setCallback(this);
1891                dr.mDrawableSizeBottom = compoundRect.height();
1892                dr.mDrawableWidthBottom = compoundRect.width();
1893            } else {
1894                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1895            }
1896        }
1897
1898        resolveDrawables();
1899        invalidate();
1900        requestLayout();
1901    }
1902
1903    /**
1904     * Sets the Drawables (if any) to appear to the start of, above,
1905     * to the end of, and below the text.  Use 0 if you do not
1906     * want a Drawable there. The Drawables' bounds will be set to
1907     * their intrinsic bounds.
1908     *
1909     * @param start Resource identifier of the start Drawable.
1910     * @param top Resource identifier of the top Drawable.
1911     * @param end Resource identifier of the end Drawable.
1912     * @param bottom Resource identifier of the bottom Drawable.
1913     *
1914     * @attr ref android.R.styleable#TextView_drawableStart
1915     * @attr ref android.R.styleable#TextView_drawableTop
1916     * @attr ref android.R.styleable#TextView_drawableEnd
1917     * @attr ref android.R.styleable#TextView_drawableBottom
1918     *
1919     * @hide
1920     */
1921    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1922            int bottom) {
1923        resetResolvedDrawables();
1924        final Resources resources = getContext().getResources();
1925        setCompoundDrawablesRelativeWithIntrinsicBounds(
1926                start != 0 ? resources.getDrawable(start) : null,
1927                top != 0 ? resources.getDrawable(top) : null,
1928                end != 0 ? resources.getDrawable(end) : null,
1929                bottom != 0 ? resources.getDrawable(bottom) : null);
1930    }
1931
1932    /**
1933     * Sets the Drawables (if any) to appear to the start of, above,
1934     * to the end of, and below the text.  Use null if you do not
1935     * want a Drawable there. The Drawables' bounds will be set to
1936     * their intrinsic bounds.
1937     *
1938     * @attr ref android.R.styleable#TextView_drawableStart
1939     * @attr ref android.R.styleable#TextView_drawableTop
1940     * @attr ref android.R.styleable#TextView_drawableEnd
1941     * @attr ref android.R.styleable#TextView_drawableBottom
1942     *
1943     * @hide
1944     */
1945    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1946            Drawable end, Drawable bottom) {
1947
1948        resetResolvedDrawables();
1949        if (start != null) {
1950            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1951        }
1952        if (end != null) {
1953            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1954        }
1955        if (top != null) {
1956            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1957        }
1958        if (bottom != null) {
1959            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1960        }
1961        setCompoundDrawablesRelative(start, top, end, bottom);
1962    }
1963
1964    /**
1965     * Returns drawables for the left, top, right, and bottom borders.
1966     */
1967    public Drawable[] getCompoundDrawables() {
1968        final Drawables dr = mDrawables;
1969        if (dr != null) {
1970            return new Drawable[] {
1971                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1972            };
1973        } else {
1974            return new Drawable[] { null, null, null, null };
1975        }
1976    }
1977
1978    /**
1979     * Returns drawables for the start, top, end, and bottom borders.
1980     *
1981     * @hide
1982     */
1983    public Drawable[] getCompoundDrawablesRelative() {
1984        final Drawables dr = mDrawables;
1985        if (dr != null) {
1986            return new Drawable[] {
1987                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
1988            };
1989        } else {
1990            return new Drawable[] { null, null, null, null };
1991        }
1992    }
1993
1994    /**
1995     * Sets the size of the padding between the compound drawables and
1996     * the text.
1997     *
1998     * @attr ref android.R.styleable#TextView_drawablePadding
1999     */
2000    public void setCompoundDrawablePadding(int pad) {
2001        Drawables dr = mDrawables;
2002        if (pad == 0) {
2003            if (dr != null) {
2004                dr.mDrawablePadding = pad;
2005            }
2006        } else {
2007            if (dr == null) {
2008                mDrawables = dr = new Drawables();
2009            }
2010            dr.mDrawablePadding = pad;
2011        }
2012
2013        invalidate();
2014        requestLayout();
2015    }
2016
2017    /**
2018     * Returns the padding between the compound drawables and the text.
2019     */
2020    public int getCompoundDrawablePadding() {
2021        final Drawables dr = mDrawables;
2022        return dr != null ? dr.mDrawablePadding : 0;
2023    }
2024
2025    @Override
2026    public void setPadding(int left, int top, int right, int bottom) {
2027        if (left != mPaddingLeft ||
2028            right != mPaddingRight ||
2029            top != mPaddingTop ||
2030            bottom != mPaddingBottom) {
2031            nullLayouts();
2032        }
2033
2034        // the super call will requestLayout()
2035        super.setPadding(left, top, right, bottom);
2036        invalidate();
2037    }
2038
2039    /**
2040     * Gets the autolink mask of the text.  See {@link
2041     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2042     * possible values.
2043     *
2044     * @attr ref android.R.styleable#TextView_autoLink
2045     */
2046    public final int getAutoLinkMask() {
2047        return mAutoLinkMask;
2048    }
2049
2050    /**
2051     * Sets the text color, size, style, hint color, and highlight color
2052     * from the specified TextAppearance resource.
2053     */
2054    public void setTextAppearance(Context context, int resid) {
2055        TypedArray appearance =
2056            context.obtainStyledAttributes(resid,
2057                                           com.android.internal.R.styleable.TextAppearance);
2058
2059        int color;
2060        ColorStateList colors;
2061        int ts;
2062
2063        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2064        if (color != 0) {
2065            setHighlightColor(color);
2066        }
2067
2068        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2069                                              TextAppearance_textColor);
2070        if (colors != null) {
2071            setTextColor(colors);
2072        }
2073
2074        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2075                                              TextAppearance_textSize, 0);
2076        if (ts != 0) {
2077            setRawTextSize(ts);
2078        }
2079
2080        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2081                                              TextAppearance_textColorHint);
2082        if (colors != null) {
2083            setHintTextColor(colors);
2084        }
2085
2086        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2087                                              TextAppearance_textColorLink);
2088        if (colors != null) {
2089            setLinkTextColor(colors);
2090        }
2091
2092        int typefaceIndex, styleIndex;
2093
2094        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2095                                          TextAppearance_typeface, -1);
2096        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2097                                       TextAppearance_textStyle, -1);
2098
2099        setTypefaceByIndex(typefaceIndex, styleIndex);
2100
2101        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2102                false)) {
2103            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2104        }
2105
2106        appearance.recycle();
2107    }
2108
2109    /**
2110     * @return the size (in pixels) of the default text size in this TextView.
2111     */
2112    public float getTextSize() {
2113        return mTextPaint.getTextSize();
2114    }
2115
2116    /**
2117     * Set the default text size to the given value, interpreted as "scaled
2118     * pixel" units.  This size is adjusted based on the current density and
2119     * user font size preference.
2120     *
2121     * @param size The scaled pixel size.
2122     *
2123     * @attr ref android.R.styleable#TextView_textSize
2124     */
2125    @android.view.RemotableViewMethod
2126    public void setTextSize(float size) {
2127        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2128    }
2129
2130    /**
2131     * Set the default text size to a given unit and value.  See {@link
2132     * TypedValue} for the possible dimension units.
2133     *
2134     * @param unit The desired dimension unit.
2135     * @param size The desired size in the given units.
2136     *
2137     * @attr ref android.R.styleable#TextView_textSize
2138     */
2139    public void setTextSize(int unit, float size) {
2140        Context c = getContext();
2141        Resources r;
2142
2143        if (c == null)
2144            r = Resources.getSystem();
2145        else
2146            r = c.getResources();
2147
2148        setRawTextSize(TypedValue.applyDimension(
2149            unit, size, r.getDisplayMetrics()));
2150    }
2151
2152    private void setRawTextSize(float size) {
2153        if (size != mTextPaint.getTextSize()) {
2154            mTextPaint.setTextSize(size);
2155
2156            if (mLayout != null) {
2157                nullLayouts();
2158                requestLayout();
2159                invalidate();
2160            }
2161        }
2162    }
2163
2164    /**
2165     * @return the extent by which text is currently being stretched
2166     * horizontally.  This will usually be 1.
2167     */
2168    public float getTextScaleX() {
2169        return mTextPaint.getTextScaleX();
2170    }
2171
2172    /**
2173     * Sets the extent by which text should be stretched horizontally.
2174     *
2175     * @attr ref android.R.styleable#TextView_textScaleX
2176     */
2177    @android.view.RemotableViewMethod
2178    public void setTextScaleX(float size) {
2179        if (size != mTextPaint.getTextScaleX()) {
2180            mUserSetTextScaleX = true;
2181            mTextPaint.setTextScaleX(size);
2182
2183            if (mLayout != null) {
2184                nullLayouts();
2185                requestLayout();
2186                invalidate();
2187            }
2188        }
2189    }
2190
2191    /**
2192     * Sets the typeface and style in which the text should be displayed.
2193     * Note that not all Typeface families actually have bold and italic
2194     * variants, so you may need to use
2195     * {@link #setTypeface(Typeface, int)} to get the appearance
2196     * that you actually want.
2197     *
2198     * @attr ref android.R.styleable#TextView_typeface
2199     * @attr ref android.R.styleable#TextView_textStyle
2200     */
2201    public void setTypeface(Typeface tf) {
2202        if (mTextPaint.getTypeface() != tf) {
2203            mTextPaint.setTypeface(tf);
2204
2205            if (mLayout != null) {
2206                nullLayouts();
2207                requestLayout();
2208                invalidate();
2209            }
2210        }
2211    }
2212
2213    /**
2214     * @return the current typeface and style in which the text is being
2215     * displayed.
2216     */
2217    public Typeface getTypeface() {
2218        return mTextPaint.getTypeface();
2219    }
2220
2221    /**
2222     * Sets the text color for all the states (normal, selected,
2223     * focused) to be this color.
2224     *
2225     * @attr ref android.R.styleable#TextView_textColor
2226     */
2227    @android.view.RemotableViewMethod
2228    public void setTextColor(int color) {
2229        mTextColor = ColorStateList.valueOf(color);
2230        updateTextColors();
2231    }
2232
2233    /**
2234     * Sets the text color.
2235     *
2236     * @attr ref android.R.styleable#TextView_textColor
2237     */
2238    public void setTextColor(ColorStateList colors) {
2239        if (colors == null) {
2240            throw new NullPointerException();
2241        }
2242
2243        mTextColor = colors;
2244        updateTextColors();
2245    }
2246
2247    /**
2248     * Return the set of text colors.
2249     *
2250     * @return Returns the set of text colors.
2251     */
2252    public final ColorStateList getTextColors() {
2253        return mTextColor;
2254    }
2255
2256    /**
2257     * <p>Return the current color selected for normal text.</p>
2258     *
2259     * @return Returns the current text color.
2260     */
2261    public final int getCurrentTextColor() {
2262        return mCurTextColor;
2263    }
2264
2265    /**
2266     * Sets the color used to display the selection highlight.
2267     *
2268     * @attr ref android.R.styleable#TextView_textColorHighlight
2269     */
2270    @android.view.RemotableViewMethod
2271    public void setHighlightColor(int color) {
2272        if (mHighlightColor != color) {
2273            mHighlightColor = color;
2274            invalidate();
2275        }
2276    }
2277
2278    /**
2279     * Gives the text a shadow of the specified radius and color, the specified
2280     * distance from its normal position.
2281     *
2282     * @attr ref android.R.styleable#TextView_shadowColor
2283     * @attr ref android.R.styleable#TextView_shadowDx
2284     * @attr ref android.R.styleable#TextView_shadowDy
2285     * @attr ref android.R.styleable#TextView_shadowRadius
2286     */
2287    public void setShadowLayer(float radius, float dx, float dy, int color) {
2288        mTextPaint.setShadowLayer(radius, dx, dy, color);
2289
2290        mShadowRadius = radius;
2291        mShadowDx = dx;
2292        mShadowDy = dy;
2293
2294        invalidate();
2295    }
2296
2297    /**
2298     * @return the base paint used for the text.  Please use this only to
2299     * consult the Paint's properties and not to change them.
2300     */
2301    public TextPaint getPaint() {
2302        return mTextPaint;
2303    }
2304
2305    /**
2306     * Sets the autolink mask of the text.  See {@link
2307     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2308     * possible values.
2309     *
2310     * @attr ref android.R.styleable#TextView_autoLink
2311     */
2312    @android.view.RemotableViewMethod
2313    public final void setAutoLinkMask(int mask) {
2314        mAutoLinkMask = mask;
2315    }
2316
2317    /**
2318     * Sets whether the movement method will automatically be set to
2319     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2320     * set to nonzero and links are detected in {@link #setText}.
2321     * The default is true.
2322     *
2323     * @attr ref android.R.styleable#TextView_linksClickable
2324     */
2325    @android.view.RemotableViewMethod
2326    public final void setLinksClickable(boolean whether) {
2327        mLinksClickable = whether;
2328    }
2329
2330    /**
2331     * Returns whether the movement method will automatically be set to
2332     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2333     * set to nonzero and links are detected in {@link #setText}.
2334     * The default is true.
2335     *
2336     * @attr ref android.R.styleable#TextView_linksClickable
2337     */
2338    public final boolean getLinksClickable() {
2339        return mLinksClickable;
2340    }
2341
2342    /**
2343     * Returns the list of URLSpans attached to the text
2344     * (by {@link Linkify} or otherwise) if any.  You can call
2345     * {@link URLSpan#getURL} on them to find where they link to
2346     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2347     * to find the region of the text they are attached to.
2348     */
2349    public URLSpan[] getUrls() {
2350        if (mText instanceof Spanned) {
2351            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2352        } else {
2353            return new URLSpan[0];
2354        }
2355    }
2356
2357    /**
2358     * Sets the color of the hint text.
2359     *
2360     * @attr ref android.R.styleable#TextView_textColorHint
2361     */
2362    @android.view.RemotableViewMethod
2363    public final void setHintTextColor(int color) {
2364        mHintTextColor = ColorStateList.valueOf(color);
2365        updateTextColors();
2366    }
2367
2368    /**
2369     * Sets the color of the hint text.
2370     *
2371     * @attr ref android.R.styleable#TextView_textColorHint
2372     */
2373    public final void setHintTextColor(ColorStateList colors) {
2374        mHintTextColor = colors;
2375        updateTextColors();
2376    }
2377
2378    /**
2379     * <p>Return the color used to paint the hint text.</p>
2380     *
2381     * @return Returns the list of hint text colors.
2382     */
2383    public final ColorStateList getHintTextColors() {
2384        return mHintTextColor;
2385    }
2386
2387    /**
2388     * <p>Return the current color selected to paint the hint text.</p>
2389     *
2390     * @return Returns the current hint text color.
2391     */
2392    public final int getCurrentHintTextColor() {
2393        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2394    }
2395
2396    /**
2397     * Sets the color of links in the text.
2398     *
2399     * @attr ref android.R.styleable#TextView_textColorLink
2400     */
2401    @android.view.RemotableViewMethod
2402    public final void setLinkTextColor(int color) {
2403        mLinkTextColor = ColorStateList.valueOf(color);
2404        updateTextColors();
2405    }
2406
2407    /**
2408     * Sets the color of links in the text.
2409     *
2410     * @attr ref android.R.styleable#TextView_textColorLink
2411     */
2412    public final void setLinkTextColor(ColorStateList colors) {
2413        mLinkTextColor = colors;
2414        updateTextColors();
2415    }
2416
2417    /**
2418     * <p>Returns the color used to paint links in the text.</p>
2419     *
2420     * @return Returns the list of link text colors.
2421     */
2422    public final ColorStateList getLinkTextColors() {
2423        return mLinkTextColor;
2424    }
2425
2426    /**
2427     * Sets the horizontal alignment of the text and the
2428     * vertical gravity that will be used when there is extra space
2429     * in the TextView beyond what is required for the text itself.
2430     *
2431     * @see android.view.Gravity
2432     * @attr ref android.R.styleable#TextView_gravity
2433     */
2434    public void setGravity(int gravity) {
2435        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2436            gravity |= Gravity.START;
2437        }
2438        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2439            gravity |= Gravity.TOP;
2440        }
2441
2442        boolean newLayout = false;
2443
2444        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2445            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2446            newLayout = true;
2447        }
2448
2449        if (gravity != mGravity) {
2450            invalidate();
2451        }
2452
2453        mGravity = gravity;
2454
2455        if (mLayout != null && newLayout) {
2456            // XXX this is heavy-handed because no actual content changes.
2457            int want = mLayout.getWidth();
2458            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2459
2460            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2461                          mRight - mLeft - getCompoundPaddingLeft() -
2462                          getCompoundPaddingRight(), true);
2463        }
2464    }
2465
2466    /**
2467     * Returns the horizontal and vertical alignment of this TextView.
2468     *
2469     * @see android.view.Gravity
2470     * @attr ref android.R.styleable#TextView_gravity
2471     */
2472    public int getGravity() {
2473        return mGravity;
2474    }
2475
2476    /**
2477     * @return the flags on the Paint being used to display the text.
2478     * @see Paint#getFlags
2479     */
2480    public int getPaintFlags() {
2481        return mTextPaint.getFlags();
2482    }
2483
2484    /**
2485     * Sets flags on the Paint being used to display the text and
2486     * reflows the text if they are different from the old flags.
2487     * @see Paint#setFlags
2488     */
2489    @android.view.RemotableViewMethod
2490    public void setPaintFlags(int flags) {
2491        if (mTextPaint.getFlags() != flags) {
2492            mTextPaint.setFlags(flags);
2493
2494            if (mLayout != null) {
2495                nullLayouts();
2496                requestLayout();
2497                invalidate();
2498            }
2499        }
2500    }
2501
2502    /**
2503     * Sets whether the text should be allowed to be wider than the
2504     * View is.  If false, it will be wrapped to the width of the View.
2505     *
2506     * @attr ref android.R.styleable#TextView_scrollHorizontally
2507     */
2508    public void setHorizontallyScrolling(boolean whether) {
2509        mHorizontallyScrolling = whether;
2510
2511        if (mLayout != null) {
2512            nullLayouts();
2513            requestLayout();
2514            invalidate();
2515        }
2516    }
2517
2518    /**
2519     * Makes the TextView at least this many lines tall.
2520     *
2521     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2522     * set this value to 1.
2523     *
2524     * @attr ref android.R.styleable#TextView_minLines
2525     */
2526    @android.view.RemotableViewMethod
2527    public void setMinLines(int minlines) {
2528        mMinimum = minlines;
2529        mMinMode = LINES;
2530
2531        requestLayout();
2532        invalidate();
2533    }
2534
2535    /**
2536     * Makes the TextView at least this many pixels tall.
2537     *
2538     * Setting this value overrides any other (minimum) number of lines setting.
2539     *
2540     * @attr ref android.R.styleable#TextView_minHeight
2541     */
2542    @android.view.RemotableViewMethod
2543    public void setMinHeight(int minHeight) {
2544        mMinimum = minHeight;
2545        mMinMode = PIXELS;
2546
2547        requestLayout();
2548        invalidate();
2549    }
2550
2551    /**
2552     * Makes the TextView at most this many lines tall.
2553     *
2554     * Setting this value overrides any other (maximum) height setting.
2555     *
2556     * @attr ref android.R.styleable#TextView_maxLines
2557     */
2558    @android.view.RemotableViewMethod
2559    public void setMaxLines(int maxlines) {
2560        mMaximum = maxlines;
2561        mMaxMode = LINES;
2562
2563        requestLayout();
2564        invalidate();
2565    }
2566
2567    /**
2568     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2569     * {@link #setMaxLines(int)} method.
2570     *
2571     * Setting this value overrides any other (maximum) number of lines setting.
2572     *
2573     * @attr ref android.R.styleable#TextView_maxHeight
2574     */
2575    @android.view.RemotableViewMethod
2576    public void setMaxHeight(int maxHeight) {
2577        mMaximum = maxHeight;
2578        mMaxMode = PIXELS;
2579
2580        requestLayout();
2581        invalidate();
2582    }
2583
2584    /**
2585     * Makes the TextView exactly this many lines tall.
2586     *
2587     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2588     * height setting. A single line TextView will set this value to 1.
2589     *
2590     * @attr ref android.R.styleable#TextView_lines
2591     */
2592    @android.view.RemotableViewMethod
2593    public void setLines(int lines) {
2594        mMaximum = mMinimum = lines;
2595        mMaxMode = mMinMode = LINES;
2596
2597        requestLayout();
2598        invalidate();
2599    }
2600
2601    /**
2602     * Makes the TextView exactly this many pixels tall.
2603     * You could do the same thing by specifying this number in the
2604     * LayoutParams.
2605     *
2606     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2607     * height setting.
2608     *
2609     * @attr ref android.R.styleable#TextView_height
2610     */
2611    @android.view.RemotableViewMethod
2612    public void setHeight(int pixels) {
2613        mMaximum = mMinimum = pixels;
2614        mMaxMode = mMinMode = PIXELS;
2615
2616        requestLayout();
2617        invalidate();
2618    }
2619
2620    /**
2621     * Makes the TextView at least this many ems wide
2622     *
2623     * @attr ref android.R.styleable#TextView_minEms
2624     */
2625    @android.view.RemotableViewMethod
2626    public void setMinEms(int minems) {
2627        mMinWidth = minems;
2628        mMinWidthMode = EMS;
2629
2630        requestLayout();
2631        invalidate();
2632    }
2633
2634    /**
2635     * Makes the TextView at least this many pixels wide
2636     *
2637     * @attr ref android.R.styleable#TextView_minWidth
2638     */
2639    @android.view.RemotableViewMethod
2640    public void setMinWidth(int minpixels) {
2641        mMinWidth = minpixels;
2642        mMinWidthMode = PIXELS;
2643
2644        requestLayout();
2645        invalidate();
2646    }
2647
2648    /**
2649     * Makes the TextView at most this many ems wide
2650     *
2651     * @attr ref android.R.styleable#TextView_maxEms
2652     */
2653    @android.view.RemotableViewMethod
2654    public void setMaxEms(int maxems) {
2655        mMaxWidth = maxems;
2656        mMaxWidthMode = EMS;
2657
2658        requestLayout();
2659        invalidate();
2660    }
2661
2662    /**
2663     * Makes the TextView at most this many pixels wide
2664     *
2665     * @attr ref android.R.styleable#TextView_maxWidth
2666     */
2667    @android.view.RemotableViewMethod
2668    public void setMaxWidth(int maxpixels) {
2669        mMaxWidth = maxpixels;
2670        mMaxWidthMode = PIXELS;
2671
2672        requestLayout();
2673        invalidate();
2674    }
2675
2676    /**
2677     * Makes the TextView exactly this many ems wide
2678     *
2679     * @attr ref android.R.styleable#TextView_ems
2680     */
2681    @android.view.RemotableViewMethod
2682    public void setEms(int ems) {
2683        mMaxWidth = mMinWidth = ems;
2684        mMaxWidthMode = mMinWidthMode = EMS;
2685
2686        requestLayout();
2687        invalidate();
2688    }
2689
2690    /**
2691     * Makes the TextView exactly this many pixels wide.
2692     * You could do the same thing by specifying this number in the
2693     * LayoutParams.
2694     *
2695     * @attr ref android.R.styleable#TextView_width
2696     */
2697    @android.view.RemotableViewMethod
2698    public void setWidth(int pixels) {
2699        mMaxWidth = mMinWidth = pixels;
2700        mMaxWidthMode = mMinWidthMode = PIXELS;
2701
2702        requestLayout();
2703        invalidate();
2704    }
2705
2706
2707    /**
2708     * Sets line spacing for this TextView.  Each line will have its height
2709     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2710     *
2711     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2712     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2713     */
2714    public void setLineSpacing(float add, float mult) {
2715        mSpacingMult = mult;
2716        mSpacingAdd = add;
2717
2718        if (mLayout != null) {
2719            nullLayouts();
2720            requestLayout();
2721            invalidate();
2722        }
2723    }
2724
2725    /**
2726     * Convenience method: Append the specified text to the TextView's
2727     * display buffer, upgrading it to BufferType.EDITABLE if it was
2728     * not already editable.
2729     */
2730    public final void append(CharSequence text) {
2731        append(text, 0, text.length());
2732    }
2733
2734    /**
2735     * Convenience method: Append the specified text slice to the TextView's
2736     * display buffer, upgrading it to BufferType.EDITABLE if it was
2737     * not already editable.
2738     */
2739    public void append(CharSequence text, int start, int end) {
2740        if (!(mText instanceof Editable)) {
2741            setText(mText, BufferType.EDITABLE);
2742        }
2743
2744        ((Editable) mText).append(text, start, end);
2745    }
2746
2747    private void updateTextColors() {
2748        boolean inval = false;
2749        int color = mTextColor.getColorForState(getDrawableState(), 0);
2750        if (color != mCurTextColor) {
2751            mCurTextColor = color;
2752            inval = true;
2753        }
2754        if (mLinkTextColor != null) {
2755            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2756            if (color != mTextPaint.linkColor) {
2757                mTextPaint.linkColor = color;
2758                inval = true;
2759            }
2760        }
2761        if (mHintTextColor != null) {
2762            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2763            if (color != mCurHintTextColor && mText.length() == 0) {
2764                mCurHintTextColor = color;
2765                inval = true;
2766            }
2767        }
2768        if (inval) {
2769            invalidate();
2770        }
2771    }
2772
2773    @Override
2774    protected void drawableStateChanged() {
2775        super.drawableStateChanged();
2776        if (mTextColor != null && mTextColor.isStateful()
2777                || (mHintTextColor != null && mHintTextColor.isStateful())
2778                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2779            updateTextColors();
2780        }
2781
2782        final Drawables dr = mDrawables;
2783        if (dr != null) {
2784            int[] state = getDrawableState();
2785            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2786                dr.mDrawableTop.setState(state);
2787            }
2788            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2789                dr.mDrawableBottom.setState(state);
2790            }
2791            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2792                dr.mDrawableLeft.setState(state);
2793            }
2794            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2795                dr.mDrawableRight.setState(state);
2796            }
2797            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2798                dr.mDrawableStart.setState(state);
2799            }
2800            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2801                dr.mDrawableEnd.setState(state);
2802            }
2803        }
2804    }
2805
2806    /**
2807     * User interface state that is stored by TextView for implementing
2808     * {@link View#onSaveInstanceState}.
2809     */
2810    public static class SavedState extends BaseSavedState {
2811        int selStart;
2812        int selEnd;
2813        CharSequence text;
2814        boolean frozenWithFocus;
2815        CharSequence error;
2816
2817        SavedState(Parcelable superState) {
2818            super(superState);
2819        }
2820
2821        @Override
2822        public void writeToParcel(Parcel out, int flags) {
2823            super.writeToParcel(out, flags);
2824            out.writeInt(selStart);
2825            out.writeInt(selEnd);
2826            out.writeInt(frozenWithFocus ? 1 : 0);
2827            TextUtils.writeToParcel(text, out, flags);
2828
2829            if (error == null) {
2830                out.writeInt(0);
2831            } else {
2832                out.writeInt(1);
2833                TextUtils.writeToParcel(error, out, flags);
2834            }
2835        }
2836
2837        @Override
2838        public String toString() {
2839            String str = "TextView.SavedState{"
2840                    + Integer.toHexString(System.identityHashCode(this))
2841                    + " start=" + selStart + " end=" + selEnd;
2842            if (text != null) {
2843                str += " text=" + text;
2844            }
2845            return str + "}";
2846        }
2847
2848        @SuppressWarnings("hiding")
2849        public static final Parcelable.Creator<SavedState> CREATOR
2850                = new Parcelable.Creator<SavedState>() {
2851            public SavedState createFromParcel(Parcel in) {
2852                return new SavedState(in);
2853            }
2854
2855            public SavedState[] newArray(int size) {
2856                return new SavedState[size];
2857            }
2858        };
2859
2860        private SavedState(Parcel in) {
2861            super(in);
2862            selStart = in.readInt();
2863            selEnd = in.readInt();
2864            frozenWithFocus = (in.readInt() != 0);
2865            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2866
2867            if (in.readInt() != 0) {
2868                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2869            }
2870        }
2871    }
2872
2873    @Override
2874    public Parcelable onSaveInstanceState() {
2875        Parcelable superState = super.onSaveInstanceState();
2876
2877        // Save state if we are forced to
2878        boolean save = mFreezesText;
2879        int start = 0;
2880        int end = 0;
2881
2882        if (mText != null) {
2883            start = getSelectionStart();
2884            end = getSelectionEnd();
2885            if (start >= 0 || end >= 0) {
2886                // Or save state if there is a selection
2887                save = true;
2888            }
2889        }
2890
2891        if (save) {
2892            SavedState ss = new SavedState(superState);
2893            // XXX Should also save the current scroll position!
2894            ss.selStart = start;
2895            ss.selEnd = end;
2896
2897            if (mText instanceof Spanned) {
2898                /*
2899                 * Calling setText() strips off any ChangeWatchers;
2900                 * strip them now to avoid leaking references.
2901                 * But do it to a copy so that if there are any
2902                 * further changes to the text of this view, it
2903                 * won't get into an inconsistent state.
2904                 */
2905
2906                Spannable sp = new SpannableString(mText);
2907
2908                for (ChangeWatcher cw :
2909                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2910                    sp.removeSpan(cw);
2911                }
2912
2913                // hideControllers would do it, but it gets called after this method on rotation
2914                sp.removeSpan(mSuggestionRangeSpan);
2915
2916                ss.text = sp;
2917            } else {
2918                ss.text = mText.toString();
2919            }
2920
2921            if (isFocused() && start >= 0 && end >= 0) {
2922                ss.frozenWithFocus = true;
2923            }
2924
2925            ss.error = mError;
2926
2927            return ss;
2928        }
2929
2930        return superState;
2931    }
2932
2933    @Override
2934    public void onRestoreInstanceState(Parcelable state) {
2935        if (!(state instanceof SavedState)) {
2936            super.onRestoreInstanceState(state);
2937            return;
2938        }
2939
2940        SavedState ss = (SavedState)state;
2941        super.onRestoreInstanceState(ss.getSuperState());
2942
2943        // XXX restore buffer type too, as well as lots of other stuff
2944        if (ss.text != null) {
2945            setText(ss.text);
2946        }
2947
2948        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2949            if (mText instanceof Spannable) {
2950                int len = mText.length();
2951
2952                if (ss.selStart > len || ss.selEnd > len) {
2953                    String restored = "";
2954
2955                    if (ss.text != null) {
2956                        restored = "(restored) ";
2957                    }
2958
2959                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2960                          "/" + ss.selEnd + " out of range for " + restored +
2961                          "text " + mText);
2962                } else {
2963                    Selection.setSelection((Spannable) mText, ss.selStart,
2964                                           ss.selEnd);
2965
2966                    if (ss.frozenWithFocus) {
2967                        mFrozenWithFocus = true;
2968                    }
2969                }
2970            }
2971        }
2972
2973        if (ss.error != null) {
2974            final CharSequence error = ss.error;
2975            // Display the error later, after the first layout pass
2976            post(new Runnable() {
2977                public void run() {
2978                    setError(error);
2979                }
2980            });
2981        }
2982    }
2983
2984    /**
2985     * Control whether this text view saves its entire text contents when
2986     * freezing to an icicle, in addition to dynamic state such as cursor
2987     * position.  By default this is false, not saving the text.  Set to true
2988     * if the text in the text view is not being saved somewhere else in
2989     * persistent storage (such as in a content provider) so that if the
2990     * view is later thawed the user will not lose their data.
2991     *
2992     * @param freezesText Controls whether a frozen icicle should include the
2993     * entire text data: true to include it, false to not.
2994     *
2995     * @attr ref android.R.styleable#TextView_freezesText
2996     */
2997    @android.view.RemotableViewMethod
2998    public void setFreezesText(boolean freezesText) {
2999        mFreezesText = freezesText;
3000    }
3001
3002    /**
3003     * Return whether this text view is including its entire text contents
3004     * in frozen icicles.
3005     *
3006     * @return Returns true if text is included, false if it isn't.
3007     *
3008     * @see #setFreezesText
3009     */
3010    public boolean getFreezesText() {
3011        return mFreezesText;
3012    }
3013
3014    ///////////////////////////////////////////////////////////////////////////
3015
3016    /**
3017     * Sets the Factory used to create new Editables.
3018     */
3019    public final void setEditableFactory(Editable.Factory factory) {
3020        mEditableFactory = factory;
3021        setText(mText);
3022    }
3023
3024    /**
3025     * Sets the Factory used to create new Spannables.
3026     */
3027    public final void setSpannableFactory(Spannable.Factory factory) {
3028        mSpannableFactory = factory;
3029        setText(mText);
3030    }
3031
3032    /**
3033     * Sets the string value of the TextView. TextView <em>does not</em> accept
3034     * HTML-like formatting, which you can do with text strings in XML resource files.
3035     * To style your strings, attach android.text.style.* objects to a
3036     * {@link android.text.SpannableString SpannableString}, or see the
3037     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3038     * Available Resource Types</a> documentation for an example of setting
3039     * formatted text in the XML resource file.
3040     *
3041     * @attr ref android.R.styleable#TextView_text
3042     */
3043    @android.view.RemotableViewMethod
3044    public final void setText(CharSequence text) {
3045        setText(text, mBufferType);
3046    }
3047
3048    /**
3049     * Like {@link #setText(CharSequence)},
3050     * except that the cursor position (if any) is retained in the new text.
3051     *
3052     * @param text The new text to place in the text view.
3053     *
3054     * @see #setText(CharSequence)
3055     */
3056    @android.view.RemotableViewMethod
3057    public final void setTextKeepState(CharSequence text) {
3058        setTextKeepState(text, mBufferType);
3059    }
3060
3061    /**
3062     * Sets the text that this TextView is to display (see
3063     * {@link #setText(CharSequence)}) and also sets whether it is stored
3064     * in a styleable/spannable buffer and whether it is editable.
3065     *
3066     * @attr ref android.R.styleable#TextView_text
3067     * @attr ref android.R.styleable#TextView_bufferType
3068     */
3069    public void setText(CharSequence text, BufferType type) {
3070        setText(text, type, true, 0);
3071
3072        if (mCharWrapper != null) {
3073            mCharWrapper.mChars = null;
3074        }
3075    }
3076
3077    private void setText(CharSequence text, BufferType type,
3078                         boolean notifyBefore, int oldlen) {
3079        if (text == null) {
3080            text = "";
3081        }
3082
3083        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3084
3085        if (text instanceof Spanned &&
3086            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3087            setHorizontalFadingEdgeEnabled(true);
3088            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3089        }
3090
3091        int n = mFilters.length;
3092        for (int i = 0; i < n; i++) {
3093            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3094                                                  EMPTY_SPANNED, 0, 0);
3095            if (out != null) {
3096                text = out;
3097            }
3098        }
3099
3100        if (notifyBefore) {
3101            if (mText != null) {
3102                oldlen = mText.length();
3103                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3104            } else {
3105                sendBeforeTextChanged("", 0, 0, text.length());
3106            }
3107        }
3108
3109        boolean needEditableForNotification = false;
3110
3111        if (mListeners != null && mListeners.size() != 0) {
3112            needEditableForNotification = true;
3113        }
3114
3115        if (type == BufferType.EDITABLE || mInput != null ||
3116            needEditableForNotification) {
3117            Editable t = mEditableFactory.newEditable(text);
3118            text = t;
3119            setFilters(t, mFilters);
3120            InputMethodManager imm = InputMethodManager.peekInstance();
3121            if (imm != null) imm.restartInput(this);
3122        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3123            text = mSpannableFactory.newSpannable(text);
3124        } else if (!(text instanceof CharWrapper)) {
3125            text = TextUtils.stringOrSpannedString(text);
3126        }
3127
3128        if (mAutoLinkMask != 0) {
3129            Spannable s2;
3130
3131            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3132                s2 = (Spannable) text;
3133            } else {
3134                s2 = mSpannableFactory.newSpannable(text);
3135            }
3136
3137            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3138                text = s2;
3139                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3140
3141                /*
3142                 * We must go ahead and set the text before changing the
3143                 * movement method, because setMovementMethod() may call
3144                 * setText() again to try to upgrade the buffer type.
3145                 */
3146                mText = text;
3147
3148                // Do not change the movement method for text that support text selection as it
3149                // would prevent an arbitrary cursor displacement.
3150                if (mLinksClickable && !textCanBeSelected()) {
3151                    setMovementMethod(LinkMovementMethod.getInstance());
3152                }
3153            }
3154        }
3155
3156        mBufferType = type;
3157        mText = text;
3158
3159        if (mTransformation == null) {
3160            mTransformed = text;
3161        } else {
3162            mTransformed = mTransformation.getTransformation(text, this);
3163        }
3164
3165        final int textLength = text.length();
3166
3167        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3168            Spannable sp = (Spannable) text;
3169
3170            // Remove any ChangeWatchers that might have come
3171            // from other TextViews.
3172            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3173            final int count = watchers.length;
3174            for (int i = 0; i < count; i++)
3175                sp.removeSpan(watchers[i]);
3176
3177            if (mChangeWatcher == null)
3178                mChangeWatcher = new ChangeWatcher();
3179
3180            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3181                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3182
3183            if (mInput != null) {
3184                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3185            }
3186
3187            if (mTransformation != null) {
3188                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3189            }
3190
3191            if (mMovement != null) {
3192                mMovement.initialize(this, (Spannable) text);
3193
3194                /*
3195                 * Initializing the movement method will have set the
3196                 * selection, so reset mSelectionMoved to keep that from
3197                 * interfering with the normal on-focus selection-setting.
3198                 */
3199                mSelectionMoved = false;
3200            }
3201        }
3202
3203        if (mLayout != null) {
3204            checkForRelayout();
3205        }
3206
3207        sendOnTextChanged(text, 0, oldlen, textLength);
3208        onTextChanged(text, 0, oldlen, textLength);
3209
3210        if (needEditableForNotification) {
3211            sendAfterTextChanged((Editable) text);
3212        }
3213
3214        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3215        prepareCursorControllers();
3216    }
3217
3218    /**
3219     * Sets the TextView to display the specified slice of the specified
3220     * char array.  You must promise that you will not change the contents
3221     * of the array except for right before another call to setText(),
3222     * since the TextView has no way to know that the text
3223     * has changed and that it needs to invalidate and re-layout.
3224     */
3225    public final void setText(char[] text, int start, int len) {
3226        int oldlen = 0;
3227
3228        if (start < 0 || len < 0 || start + len > text.length) {
3229            throw new IndexOutOfBoundsException(start + ", " + len);
3230        }
3231
3232        /*
3233         * We must do the before-notification here ourselves because if
3234         * the old text is a CharWrapper we destroy it before calling
3235         * into the normal path.
3236         */
3237        if (mText != null) {
3238            oldlen = mText.length();
3239            sendBeforeTextChanged(mText, 0, oldlen, len);
3240        } else {
3241            sendBeforeTextChanged("", 0, 0, len);
3242        }
3243
3244        if (mCharWrapper == null) {
3245            mCharWrapper = new CharWrapper(text, start, len);
3246        } else {
3247            mCharWrapper.set(text, start, len);
3248        }
3249
3250        setText(mCharWrapper, mBufferType, false, oldlen);
3251    }
3252
3253    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3254        private char[] mChars;
3255        private int mStart, mLength;
3256
3257        public CharWrapper(char[] chars, int start, int len) {
3258            mChars = chars;
3259            mStart = start;
3260            mLength = len;
3261        }
3262
3263        /* package */ void set(char[] chars, int start, int len) {
3264            mChars = chars;
3265            mStart = start;
3266            mLength = len;
3267        }
3268
3269        public int length() {
3270            return mLength;
3271        }
3272
3273        public char charAt(int off) {
3274            return mChars[off + mStart];
3275        }
3276
3277        @Override
3278        public String toString() {
3279            return new String(mChars, mStart, mLength);
3280        }
3281
3282        public CharSequence subSequence(int start, int end) {
3283            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3284                throw new IndexOutOfBoundsException(start + ", " + end);
3285            }
3286
3287            return new String(mChars, start + mStart, end - start);
3288        }
3289
3290        public void getChars(int start, int end, char[] buf, int off) {
3291            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3292                throw new IndexOutOfBoundsException(start + ", " + end);
3293            }
3294
3295            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3296        }
3297
3298        public void drawText(Canvas c, int start, int end,
3299                             float x, float y, Paint p) {
3300            c.drawText(mChars, start + mStart, end - start, x, y, p);
3301        }
3302
3303        public void drawTextRun(Canvas c, int start, int end,
3304                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3305            int count = end - start;
3306            int contextCount = contextEnd - contextStart;
3307            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3308                    contextCount, x, y, flags, p);
3309        }
3310
3311        public float measureText(int start, int end, Paint p) {
3312            return p.measureText(mChars, start + mStart, end - start);
3313        }
3314
3315        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3316            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3317        }
3318
3319        public float getTextRunAdvances(int start, int end, int contextStart,
3320                int contextEnd, int flags, float[] advances, int advancesIndex,
3321                Paint p) {
3322            int count = end - start;
3323            int contextCount = contextEnd - contextStart;
3324            return p.getTextRunAdvances(mChars, start + mStart, count,
3325                    contextStart + mStart, contextCount, flags, advances,
3326                    advancesIndex);
3327        }
3328
3329        public float getTextRunAdvances(int start, int end, int contextStart,
3330                int contextEnd, int flags, float[] advances, int advancesIndex,
3331                Paint p, int reserved) {
3332            int count = end - start;
3333            int contextCount = contextEnd - contextStart;
3334            return p.getTextRunAdvances(mChars, start + mStart, count,
3335                    contextStart + mStart, contextCount, flags, advances,
3336                    advancesIndex, reserved);
3337        }
3338
3339        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3340                int offset, int cursorOpt, Paint p) {
3341            int contextCount = contextEnd - contextStart;
3342            return p.getTextRunCursor(mChars, contextStart + mStart,
3343                    contextCount, flags, offset + mStart, cursorOpt);
3344        }
3345    }
3346
3347    /**
3348     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3349     * except that the cursor position (if any) is retained in the new text.
3350     *
3351     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3352     */
3353    public final void setTextKeepState(CharSequence text, BufferType type) {
3354        int start = getSelectionStart();
3355        int end = getSelectionEnd();
3356        int len = text.length();
3357
3358        setText(text, type);
3359
3360        if (start >= 0 || end >= 0) {
3361            if (mText instanceof Spannable) {
3362                Selection.setSelection((Spannable) mText,
3363                                       Math.max(0, Math.min(start, len)),
3364                                       Math.max(0, Math.min(end, len)));
3365            }
3366        }
3367    }
3368
3369    @android.view.RemotableViewMethod
3370    public final void setText(int resid) {
3371        setText(getContext().getResources().getText(resid));
3372    }
3373
3374    public final void setText(int resid, BufferType type) {
3375        setText(getContext().getResources().getText(resid), type);
3376    }
3377
3378    /**
3379     * Sets the text to be displayed when the text of the TextView is empty.
3380     * Null means to use the normal empty text. The hint does not currently
3381     * participate in determining the size of the view.
3382     *
3383     * @attr ref android.R.styleable#TextView_hint
3384     */
3385    @android.view.RemotableViewMethod
3386    public final void setHint(CharSequence hint) {
3387        mHint = TextUtils.stringOrSpannedString(hint);
3388
3389        if (mLayout != null) {
3390            checkForRelayout();
3391        }
3392
3393        if (mText.length() == 0) {
3394            invalidate();
3395        }
3396    }
3397
3398    /**
3399     * Sets the text to be displayed when the text of the TextView is empty,
3400     * from a resource.
3401     *
3402     * @attr ref android.R.styleable#TextView_hint
3403     */
3404    @android.view.RemotableViewMethod
3405    public final void setHint(int resid) {
3406        setHint(getContext().getResources().getText(resid));
3407    }
3408
3409    /**
3410     * Returns the hint that is displayed when the text of the TextView
3411     * is empty.
3412     *
3413     * @attr ref android.R.styleable#TextView_hint
3414     */
3415    @ViewDebug.CapturedViewProperty
3416    public CharSequence getHint() {
3417        return mHint;
3418    }
3419
3420    private boolean isMultilineInputType(int type) {
3421        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3422            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3423    }
3424
3425    /**
3426     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3427     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3428     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3429     * then a soft keyboard will not be displayed for this text view.
3430     *
3431     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3432     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3433     * type.
3434     *
3435     * @see #getInputType()
3436     * @see #setRawInputType(int)
3437     * @see android.text.InputType
3438     * @attr ref android.R.styleable#TextView_inputType
3439     */
3440    public void setInputType(int type) {
3441        final boolean wasPassword = isPasswordInputType(mInputType);
3442        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3443        setInputType(type, false);
3444        final boolean isPassword = isPasswordInputType(type);
3445        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3446        boolean forceUpdate = false;
3447        if (isPassword) {
3448            setTransformationMethod(PasswordTransformationMethod.getInstance());
3449            setTypefaceByIndex(MONOSPACE, 0);
3450        } else if (isVisiblePassword) {
3451            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3452                forceUpdate = true;
3453            }
3454            setTypefaceByIndex(MONOSPACE, 0);
3455        } else if (wasPassword || wasVisiblePassword) {
3456            // not in password mode, clean up typeface and transformation
3457            setTypefaceByIndex(-1, -1);
3458            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3459                forceUpdate = true;
3460            }
3461        }
3462
3463        boolean singleLine = !isMultilineInputType(type);
3464
3465        // We need to update the single line mode if it has changed or we
3466        // were previously in password mode.
3467        if (mSingleLine != singleLine || forceUpdate) {
3468            // Change single line mode, but only change the transformation if
3469            // we are not in password mode.
3470            applySingleLine(singleLine, !isPassword, true);
3471        }
3472
3473        InputMethodManager imm = InputMethodManager.peekInstance();
3474        if (imm != null) imm.restartInput(this);
3475    }
3476
3477    /**
3478     * It would be better to rely on the input type for everything. A password inputType should have
3479     * a password transformation. We should hence use isPasswordInputType instead of this method.
3480     *
3481     * We should:
3482     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3483     * would install the correct transformation).
3484     * - Refuse the installation of a non-password transformation in setTransformation if the input
3485     * type is password.
3486     *
3487     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3488     * is useful since it matches what the user can see (obfuscated text or not).
3489     *
3490     * @return true if the current transformation method is of the password type.
3491     */
3492    private boolean hasPasswordTransformationMethod() {
3493        return mTransformation instanceof PasswordTransformationMethod;
3494    }
3495
3496    private boolean isPasswordInputType(int inputType) {
3497        final int variation =
3498                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3499        return variation
3500                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3501                || variation
3502                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3503                || variation
3504                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3505    }
3506
3507    private boolean isVisiblePasswordInputType(int inputType) {
3508        final int variation =
3509                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3510        return variation
3511                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3512    }
3513
3514    /**
3515     * Directly change the content type integer of the text view, without
3516     * modifying any other state.
3517     * @see #setInputType(int)
3518     * @see android.text.InputType
3519     * @attr ref android.R.styleable#TextView_inputType
3520     */
3521    public void setRawInputType(int type) {
3522        mInputType = type;
3523    }
3524
3525    private void setInputType(int type, boolean direct) {
3526        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3527        KeyListener input;
3528        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3529            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3530            TextKeyListener.Capitalize cap;
3531            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3532                cap = TextKeyListener.Capitalize.CHARACTERS;
3533            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3534                cap = TextKeyListener.Capitalize.WORDS;
3535            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3536                cap = TextKeyListener.Capitalize.SENTENCES;
3537            } else {
3538                cap = TextKeyListener.Capitalize.NONE;
3539            }
3540            input = TextKeyListener.getInstance(autotext, cap);
3541        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3542            input = DigitsKeyListener.getInstance(
3543                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3544                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3545        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3546            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3547                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3548                    input = DateKeyListener.getInstance();
3549                    break;
3550                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3551                    input = TimeKeyListener.getInstance();
3552                    break;
3553                default:
3554                    input = DateTimeKeyListener.getInstance();
3555                    break;
3556            }
3557        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3558            input = DialerKeyListener.getInstance();
3559        } else {
3560            input = TextKeyListener.getInstance();
3561        }
3562        setRawInputType(type);
3563        if (direct) mInput = input;
3564        else {
3565            setKeyListenerOnly(input);
3566        }
3567    }
3568
3569    /**
3570     * Get the type of the content.
3571     *
3572     * @see #setInputType(int)
3573     * @see android.text.InputType
3574     */
3575    public int getInputType() {
3576        return mInputType;
3577    }
3578
3579    /**
3580     * Change the editor type integer associated with the text view, which
3581     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3582     * has focus.
3583     * @see #getImeOptions
3584     * @see android.view.inputmethod.EditorInfo
3585     * @attr ref android.R.styleable#TextView_imeOptions
3586     */
3587    public void setImeOptions(int imeOptions) {
3588        if (mInputContentType == null) {
3589            mInputContentType = new InputContentType();
3590        }
3591        mInputContentType.imeOptions = imeOptions;
3592    }
3593
3594    /**
3595     * Get the type of the IME editor.
3596     *
3597     * @see #setImeOptions(int)
3598     * @see android.view.inputmethod.EditorInfo
3599     */
3600    public int getImeOptions() {
3601        return mInputContentType != null
3602                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3603    }
3604
3605    /**
3606     * Change the custom IME action associated with the text view, which
3607     * will be reported to an IME with {@link EditorInfo#actionLabel}
3608     * and {@link EditorInfo#actionId} when it has focus.
3609     * @see #getImeActionLabel
3610     * @see #getImeActionId
3611     * @see android.view.inputmethod.EditorInfo
3612     * @attr ref android.R.styleable#TextView_imeActionLabel
3613     * @attr ref android.R.styleable#TextView_imeActionId
3614     */
3615    public void setImeActionLabel(CharSequence label, int actionId) {
3616        if (mInputContentType == null) {
3617            mInputContentType = new InputContentType();
3618        }
3619        mInputContentType.imeActionLabel = label;
3620        mInputContentType.imeActionId = actionId;
3621    }
3622
3623    /**
3624     * Get the IME action label previous set with {@link #setImeActionLabel}.
3625     *
3626     * @see #setImeActionLabel
3627     * @see android.view.inputmethod.EditorInfo
3628     */
3629    public CharSequence getImeActionLabel() {
3630        return mInputContentType != null
3631                ? mInputContentType.imeActionLabel : null;
3632    }
3633
3634    /**
3635     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3636     *
3637     * @see #setImeActionLabel
3638     * @see android.view.inputmethod.EditorInfo
3639     */
3640    public int getImeActionId() {
3641        return mInputContentType != null
3642                ? mInputContentType.imeActionId : 0;
3643    }
3644
3645    /**
3646     * Set a special listener to be called when an action is performed
3647     * on the text view.  This will be called when the enter key is pressed,
3648     * or when an action supplied to the IME is selected by the user.  Setting
3649     * this means that the normal hard key event will not insert a newline
3650     * into the text view, even if it is multi-line; holding down the ALT
3651     * modifier will, however, allow the user to insert a newline character.
3652     */
3653    public void setOnEditorActionListener(OnEditorActionListener l) {
3654        if (mInputContentType == null) {
3655            mInputContentType = new InputContentType();
3656        }
3657        mInputContentType.onEditorActionListener = l;
3658    }
3659
3660    /**
3661     * Called when an attached input method calls
3662     * {@link InputConnection#performEditorAction(int)
3663     * InputConnection.performEditorAction()}
3664     * for this text view.  The default implementation will call your action
3665     * listener supplied to {@link #setOnEditorActionListener}, or perform
3666     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3667     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3668     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3669     * EditorInfo.IME_ACTION_DONE}.
3670     *
3671     * <p>For backwards compatibility, if no IME options have been set and the
3672     * text view would not normally advance focus on enter, then
3673     * the NEXT and DONE actions received here will be turned into an enter
3674     * key down/up pair to go through the normal key handling.
3675     *
3676     * @param actionCode The code of the action being performed.
3677     *
3678     * @see #setOnEditorActionListener
3679     */
3680    public void onEditorAction(int actionCode) {
3681        final InputContentType ict = mInputContentType;
3682        if (ict != null) {
3683            if (ict.onEditorActionListener != null) {
3684                if (ict.onEditorActionListener.onEditorAction(this,
3685                        actionCode, null)) {
3686                    return;
3687                }
3688            }
3689
3690            // This is the handling for some default action.
3691            // Note that for backwards compatibility we don't do this
3692            // default handling if explicit ime options have not been given,
3693            // instead turning this into the normal enter key codes that an
3694            // app may be expecting.
3695            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3696                View v = focusSearch(FOCUS_DOWN);
3697                if (v != null) {
3698                    if (!v.requestFocus(FOCUS_DOWN)) {
3699                        throw new IllegalStateException("focus search returned a view " +
3700                                "that wasn't able to take focus!");
3701                    }
3702                }
3703                return;
3704
3705            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3706                View v = focusSearch(FOCUS_UP);
3707                if (v != null) {
3708                    if (!v.requestFocus(FOCUS_UP)) {
3709                        throw new IllegalStateException("focus search returned a view " +
3710                                "that wasn't able to take focus!");
3711                    }
3712                }
3713                return;
3714
3715            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3716                InputMethodManager imm = InputMethodManager.peekInstance();
3717                if (imm != null && imm.isActive(this)) {
3718                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3719                }
3720                return;
3721            }
3722        }
3723
3724        Handler h = getHandler();
3725        if (h != null) {
3726            long eventTime = SystemClock.uptimeMillis();
3727            h.sendMessage(h.obtainMessage(ViewAncestor.DISPATCH_KEY_FROM_IME,
3728                    new KeyEvent(eventTime, eventTime,
3729                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3730                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3731                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3732                    | KeyEvent.FLAG_EDITOR_ACTION)));
3733            h.sendMessage(h.obtainMessage(ViewAncestor.DISPATCH_KEY_FROM_IME,
3734                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3735                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3736                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3737                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3738                    | KeyEvent.FLAG_EDITOR_ACTION)));
3739        }
3740    }
3741
3742    /**
3743     * Set the private content type of the text, which is the
3744     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3745     * field that will be filled in when creating an input connection.
3746     *
3747     * @see #getPrivateImeOptions()
3748     * @see EditorInfo#privateImeOptions
3749     * @attr ref android.R.styleable#TextView_privateImeOptions
3750     */
3751    public void setPrivateImeOptions(String type) {
3752        if (mInputContentType == null) mInputContentType = new InputContentType();
3753        mInputContentType.privateImeOptions = type;
3754    }
3755
3756    /**
3757     * Get the private type of the content.
3758     *
3759     * @see #setPrivateImeOptions(String)
3760     * @see EditorInfo#privateImeOptions
3761     */
3762    public String getPrivateImeOptions() {
3763        return mInputContentType != null
3764                ? mInputContentType.privateImeOptions : null;
3765    }
3766
3767    /**
3768     * Set the extra input data of the text, which is the
3769     * {@link EditorInfo#extras TextBoxAttribute.extras}
3770     * Bundle that will be filled in when creating an input connection.  The
3771     * given integer is the resource ID of an XML resource holding an
3772     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3773     *
3774     * @see #getInputExtras(boolean)
3775     * @see EditorInfo#extras
3776     * @attr ref android.R.styleable#TextView_editorExtras
3777     */
3778    public void setInputExtras(int xmlResId)
3779            throws XmlPullParserException, IOException {
3780        XmlResourceParser parser = getResources().getXml(xmlResId);
3781        if (mInputContentType == null) mInputContentType = new InputContentType();
3782        mInputContentType.extras = new Bundle();
3783        getResources().parseBundleExtras(parser, mInputContentType.extras);
3784    }
3785
3786    /**
3787     * Retrieve the input extras currently associated with the text view, which
3788     * can be viewed as well as modified.
3789     *
3790     * @param create If true, the extras will be created if they don't already
3791     * exist.  Otherwise, null will be returned if none have been created.
3792     * @see #setInputExtras(int)
3793     * @see EditorInfo#extras
3794     * @attr ref android.R.styleable#TextView_editorExtras
3795     */
3796    public Bundle getInputExtras(boolean create) {
3797        if (mInputContentType == null) {
3798            if (!create) return null;
3799            mInputContentType = new InputContentType();
3800        }
3801        if (mInputContentType.extras == null) {
3802            if (!create) return null;
3803            mInputContentType.extras = new Bundle();
3804        }
3805        return mInputContentType.extras;
3806    }
3807
3808    /**
3809     * Returns the error message that was set to be displayed with
3810     * {@link #setError}, or <code>null</code> if no error was set
3811     * or if it the error was cleared by the widget after user input.
3812     */
3813    public CharSequence getError() {
3814        return mError;
3815    }
3816
3817    /**
3818     * Sets the right-hand compound drawable of the TextView to the "error"
3819     * icon and sets an error message that will be displayed in a popup when
3820     * the TextView has focus.  The icon and error message will be reset to
3821     * null when any key events cause changes to the TextView's text.  If the
3822     * <code>error</code> is <code>null</code>, the error message and icon
3823     * will be cleared.
3824     */
3825    @android.view.RemotableViewMethod
3826    public void setError(CharSequence error) {
3827        if (error == null) {
3828            setError(null, null);
3829        } else {
3830            Drawable dr = getContext().getResources().
3831                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3832
3833            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3834            setError(error, dr);
3835        }
3836    }
3837
3838    /**
3839     * Sets the right-hand compound drawable of the TextView to the specified
3840     * icon and sets an error message that will be displayed in a popup when
3841     * the TextView has focus.  The icon and error message will be reset to
3842     * null when any key events cause changes to the TextView's text.  The
3843     * drawable must already have had {@link Drawable#setBounds} set on it.
3844     * If the <code>error</code> is <code>null</code>, the error message will
3845     * be cleared (and you should provide a <code>null</code> icon as well).
3846     */
3847    public void setError(CharSequence error, Drawable icon) {
3848        error = TextUtils.stringOrSpannedString(error);
3849
3850        mError = error;
3851        mErrorWasChanged = true;
3852        final Drawables dr = mDrawables;
3853        if (dr != null) {
3854            switch (getResolvedLayoutDirection()) {
3855                default:
3856                case LAYOUT_DIRECTION_LTR:
3857                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3858                            dr.mDrawableBottom);
3859                    break;
3860                case LAYOUT_DIRECTION_RTL:
3861                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3862                            dr.mDrawableBottom);
3863                    break;
3864            }
3865        } else {
3866            setCompoundDrawables(null, null, icon, null);
3867        }
3868
3869        if (error == null) {
3870            if (mPopup != null) {
3871                if (mPopup.isShowing()) {
3872                    mPopup.dismiss();
3873                }
3874
3875                mPopup = null;
3876            }
3877        } else {
3878            if (isFocused()) {
3879                showError();
3880            }
3881        }
3882    }
3883
3884    private void showError() {
3885        if (getWindowToken() == null) {
3886            mShowErrorAfterAttach = true;
3887            return;
3888        }
3889
3890        if (mPopup == null) {
3891            LayoutInflater inflater = LayoutInflater.from(getContext());
3892            final TextView err = (TextView) inflater.inflate(
3893                    com.android.internal.R.layout.textview_hint, null);
3894
3895            final float scale = getResources().getDisplayMetrics().density;
3896            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3897            mPopup.setFocusable(false);
3898            // The user is entering text, so the input method is needed.  We
3899            // don't want the popup to be displayed on top of it.
3900            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3901        }
3902
3903        TextView tv = (TextView) mPopup.getContentView();
3904        chooseSize(mPopup, mError, tv);
3905        tv.setText(mError);
3906
3907        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3908        mPopup.fixDirection(mPopup.isAboveAnchor());
3909    }
3910
3911    private static class ErrorPopup extends PopupWindow {
3912        private boolean mAbove = false;
3913        private final TextView mView;
3914        private int mPopupInlineErrorBackgroundId = 0;
3915        private int mPopupInlineErrorAboveBackgroundId = 0;
3916
3917        ErrorPopup(TextView v, int width, int height) {
3918            super(v, width, height);
3919            mView = v;
3920            // Make sure the TextView has a background set as it will be used the first time it is
3921            // shown and positionned. Initialized with below background, which should have
3922            // dimensions identical to the above version for this to work (and is more likely).
3923            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3924                    com.android.internal.R.styleable.Theme_errorMessageBackground);
3925            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
3926        }
3927
3928        void fixDirection(boolean above) {
3929            mAbove = above;
3930
3931            if (above) {
3932                mPopupInlineErrorAboveBackgroundId =
3933                    getResourceId(mPopupInlineErrorAboveBackgroundId,
3934                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3935            } else {
3936                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3937                        com.android.internal.R.styleable.Theme_errorMessageBackground);
3938            }
3939
3940            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
3941                mPopupInlineErrorBackgroundId);
3942        }
3943
3944        private int getResourceId(int currentId, int index) {
3945            if (currentId == 0) {
3946                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
3947                        R.styleable.Theme);
3948                currentId = styledAttributes.getResourceId(index, 0);
3949                styledAttributes.recycle();
3950            }
3951            return currentId;
3952        }
3953
3954        @Override
3955        public void update(int x, int y, int w, int h, boolean force) {
3956            super.update(x, y, w, h, force);
3957
3958            boolean above = isAboveAnchor();
3959            if (above != mAbove) {
3960                fixDirection(above);
3961            }
3962        }
3963    }
3964
3965    /**
3966     * Returns the Y offset to make the pointy top of the error point
3967     * at the middle of the error icon.
3968     */
3969    private int getErrorX() {
3970        /*
3971         * The "25" is the distance between the point and the right edge
3972         * of the background
3973         */
3974        final float scale = getResources().getDisplayMetrics().density;
3975
3976        final Drawables dr = mDrawables;
3977        return getWidth() - mPopup.getWidth() - getPaddingRight() -
3978                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3979    }
3980
3981    /**
3982     * Returns the Y offset to make the pointy top of the error point
3983     * at the bottom of the error icon.
3984     */
3985    private int getErrorY() {
3986        /*
3987         * Compound, not extended, because the icon is not clipped
3988         * if the text height is smaller.
3989         */
3990        final int compoundPaddingTop = getCompoundPaddingTop();
3991        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
3992
3993        final Drawables dr = mDrawables;
3994        int icontop = compoundPaddingTop +
3995                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3996
3997        /*
3998         * The "2" is the distance between the point and the top edge
3999         * of the background.
4000         */
4001        final float scale = getResources().getDisplayMetrics().density;
4002        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4003                (int) (2 * scale + 0.5f);
4004    }
4005
4006    private void hideError() {
4007        if (mPopup != null) {
4008            if (mPopup.isShowing()) {
4009                mPopup.dismiss();
4010            }
4011        }
4012
4013        mShowErrorAfterAttach = false;
4014    }
4015
4016    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4017        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4018        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4019
4020        /*
4021         * Figure out how big the text would be if we laid it out to the
4022         * full width of this view minus the border.
4023         */
4024        int cap = getWidth() - wid;
4025        if (cap < 0) {
4026            cap = 200; // We must not be measured yet -- setFrame() will fix it.
4027        }
4028
4029        Layout l = new StaticLayout(text, tv.getPaint(), cap,
4030                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4031        float max = 0;
4032        for (int i = 0; i < l.getLineCount(); i++) {
4033            max = Math.max(max, l.getLineWidth(i));
4034        }
4035
4036        /*
4037         * Now set the popup size to be big enough for the text plus the border.
4038         */
4039        pop.setWidth(wid + (int) Math.ceil(max));
4040        pop.setHeight(ht + l.getHeight());
4041    }
4042
4043
4044    @Override
4045    protected boolean setFrame(int l, int t, int r, int b) {
4046        boolean result = super.setFrame(l, t, r, b);
4047
4048        if (mPopup != null) {
4049            TextView tv = (TextView) mPopup.getContentView();
4050            chooseSize(mPopup, mError, tv);
4051            mPopup.update(this, getErrorX(), getErrorY(),
4052                          mPopup.getWidth(), mPopup.getHeight());
4053        }
4054
4055        restartMarqueeIfNeeded();
4056
4057        return result;
4058    }
4059
4060    private void restartMarqueeIfNeeded() {
4061        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4062            mRestartMarquee = false;
4063            startMarquee();
4064        }
4065    }
4066
4067    /**
4068     * Sets the list of input filters that will be used if the buffer is
4069     * Editable.  Has no effect otherwise.
4070     *
4071     * @attr ref android.R.styleable#TextView_maxLength
4072     */
4073    public void setFilters(InputFilter[] filters) {
4074        if (filters == null) {
4075            throw new IllegalArgumentException();
4076        }
4077
4078        mFilters = filters;
4079
4080        if (mText instanceof Editable) {
4081            setFilters((Editable) mText, filters);
4082        }
4083    }
4084
4085    /**
4086     * Sets the list of input filters on the specified Editable,
4087     * and includes mInput in the list if it is an InputFilter.
4088     */
4089    private void setFilters(Editable e, InputFilter[] filters) {
4090        if (mInput instanceof InputFilter) {
4091            InputFilter[] nf = new InputFilter[filters.length + 1];
4092
4093            System.arraycopy(filters, 0, nf, 0, filters.length);
4094            nf[filters.length] = (InputFilter) mInput;
4095
4096            e.setFilters(nf);
4097        } else {
4098            e.setFilters(filters);
4099        }
4100    }
4101
4102    /**
4103     * Returns the current list of input filters.
4104     */
4105    public InputFilter[] getFilters() {
4106        return mFilters;
4107    }
4108
4109    /////////////////////////////////////////////////////////////////////////
4110
4111    private int getVerticalOffset(boolean forceNormal) {
4112        int voffset = 0;
4113        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4114
4115        Layout l = mLayout;
4116        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4117            l = mHintLayout;
4118        }
4119
4120        if (gravity != Gravity.TOP) {
4121            int boxht;
4122
4123            if (l == mHintLayout) {
4124                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4125                        getCompoundPaddingBottom();
4126            } else {
4127                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4128                        getExtendedPaddingBottom();
4129            }
4130            int textht = l.getHeight();
4131
4132            if (textht < boxht) {
4133                if (gravity == Gravity.BOTTOM)
4134                    voffset = boxht - textht;
4135                else // (gravity == Gravity.CENTER_VERTICAL)
4136                    voffset = (boxht - textht) >> 1;
4137            }
4138        }
4139        return voffset;
4140    }
4141
4142    private int getBottomVerticalOffset(boolean forceNormal) {
4143        int voffset = 0;
4144        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4145
4146        Layout l = mLayout;
4147        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4148            l = mHintLayout;
4149        }
4150
4151        if (gravity != Gravity.BOTTOM) {
4152            int boxht;
4153
4154            if (l == mHintLayout) {
4155                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4156                        getCompoundPaddingBottom();
4157            } else {
4158                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4159                        getExtendedPaddingBottom();
4160            }
4161            int textht = l.getHeight();
4162
4163            if (textht < boxht) {
4164                if (gravity == Gravity.TOP)
4165                    voffset = boxht - textht;
4166                else // (gravity == Gravity.CENTER_VERTICAL)
4167                    voffset = (boxht - textht) >> 1;
4168            }
4169        }
4170        return voffset;
4171    }
4172
4173    private void invalidateCursorPath() {
4174        if (mHighlightPathBogus) {
4175            invalidateCursor();
4176        } else {
4177            final int horizontalPadding = getCompoundPaddingLeft();
4178            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4179
4180            if (mCursorCount == 0) {
4181                synchronized (sTempRect) {
4182                    /*
4183                     * The reason for this concern about the thickness of the
4184                     * cursor and doing the floor/ceil on the coordinates is that
4185                     * some EditTexts (notably textfields in the Browser) have
4186                     * anti-aliased text where not all the characters are
4187                     * necessarily at integer-multiple locations.  This should
4188                     * make sure the entire cursor gets invalidated instead of
4189                     * sometimes missing half a pixel.
4190                     */
4191                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4192                    if (thick < 1.0f) {
4193                        thick = 1.0f;
4194                    }
4195
4196                    thick /= 2.0f;
4197
4198                    mHighlightPath.computeBounds(sTempRect, false);
4199
4200                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4201                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4202                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4203                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4204                }
4205            } else {
4206                for (int i = 0; i < mCursorCount; i++) {
4207                    Rect bounds = mCursorDrawable[i].getBounds();
4208                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4209                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4210                }
4211            }
4212        }
4213    }
4214
4215    private void invalidateCursor() {
4216        int where = getSelectionEnd();
4217
4218        invalidateCursor(where, where, where);
4219    }
4220
4221    private void invalidateCursor(int a, int b, int c) {
4222        if (mLayout == null) {
4223            invalidate();
4224        } else {
4225            if (a >= 0 || b >= 0 || c >= 0) {
4226                int first = Math.min(Math.min(a, b), c);
4227                int last = Math.max(Math.max(a, b), c);
4228
4229                int line = mLayout.getLineForOffset(first);
4230                int top = mLayout.getLineTop(line);
4231
4232                // This is ridiculous, but the descent from the line above
4233                // can hang down into the line we really want to redraw,
4234                // so we have to invalidate part of the line above to make
4235                // sure everything that needs to be redrawn really is.
4236                // (But not the whole line above, because that would cause
4237                // the same problem with the descenders on the line above it!)
4238                if (line > 0) {
4239                    top -= mLayout.getLineDescent(line - 1);
4240                }
4241
4242                int line2;
4243
4244                if (first == last)
4245                    line2 = line;
4246                else
4247                    line2 = mLayout.getLineForOffset(last);
4248
4249                int bottom = mLayout.getLineTop(line2 + 1);
4250
4251                final int horizontalPadding = getCompoundPaddingLeft();
4252                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4253
4254                // If used, the cursor drawables can have an arbitrary dimension that can go beyond
4255                // the invalidated lines specified above.
4256                for (int i = 0; i < mCursorCount; i++) {
4257                    Rect bounds = mCursorDrawable[i].getBounds();
4258                    top = Math.min(top, bounds.top);
4259                    bottom = Math.max(bottom, bounds.bottom);
4260                    // Horizontal bounds are already full width, no need to update
4261                }
4262
4263                invalidate(horizontalPadding + mScrollX, top + verticalPadding,
4264                        horizontalPadding + mScrollX + getWidth() -
4265                        getCompoundPaddingLeft() - getCompoundPaddingRight(),
4266                        bottom + verticalPadding);
4267            }
4268        }
4269    }
4270
4271    private void registerForPreDraw() {
4272        final ViewTreeObserver observer = getViewTreeObserver();
4273
4274        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4275            observer.addOnPreDrawListener(this);
4276            mPreDrawState = PREDRAW_PENDING;
4277        } else if (mPreDrawState == PREDRAW_DONE) {
4278            mPreDrawState = PREDRAW_PENDING;
4279        }
4280
4281        // else state is PREDRAW_PENDING, so keep waiting.
4282    }
4283
4284    /**
4285     * {@inheritDoc}
4286     */
4287    public boolean onPreDraw() {
4288        if (mPreDrawState != PREDRAW_PENDING) {
4289            return true;
4290        }
4291
4292        if (mLayout == null) {
4293            assumeLayout();
4294        }
4295
4296        boolean changed = false;
4297
4298        if (mMovement != null) {
4299            /* This code also provides auto-scrolling when a cursor is moved using a
4300             * CursorController (insertion point or selection limits).
4301             * For selection, ensure start or end is visible depending on controller's state.
4302             */
4303            int curs = getSelectionEnd();
4304            // Do not create the controller if it is not already created.
4305            if (mSelectionModifierCursorController != null &&
4306                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4307                curs = getSelectionStart();
4308            }
4309
4310            /*
4311             * TODO: This should really only keep the end in view if
4312             * it already was before the text changed.  I'm not sure
4313             * of a good way to tell from here if it was.
4314             */
4315            if (curs < 0 &&
4316                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4317                curs = mText.length();
4318            }
4319
4320            if (curs >= 0) {
4321                changed = bringPointIntoView(curs);
4322            }
4323        } else {
4324            changed = bringTextIntoView();
4325        }
4326
4327        // This has to be checked here since:
4328        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4329        //   a screen rotation) since layout is not yet initialized at that point.
4330        if (mCreatedWithASelection) {
4331            startSelectionActionMode();
4332            mCreatedWithASelection = false;
4333        }
4334
4335        // Phone specific code (there is no ExtractEditText on tablets).
4336        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4337        // not be set. Do the test here instead.
4338        if (this instanceof ExtractEditText && hasSelection()) {
4339            startSelectionActionMode();
4340        }
4341
4342        mPreDrawState = PREDRAW_DONE;
4343        return !changed;
4344    }
4345
4346    @Override
4347    protected void onAttachedToWindow() {
4348        super.onAttachedToWindow();
4349
4350        mTemporaryDetach = false;
4351
4352        if (mShowErrorAfterAttach) {
4353            showError();
4354            mShowErrorAfterAttach = false;
4355        }
4356
4357        final ViewTreeObserver observer = getViewTreeObserver();
4358        // No need to create the controller.
4359        // The get method will add the listener on controller creation.
4360        if (mInsertionPointCursorController != null) {
4361            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4362        }
4363        if (mSelectionModifierCursorController != null) {
4364            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4365        }
4366
4367        // Resolve drawables as the layout direction has been resolved
4368        resolveDrawables();
4369    }
4370
4371    @Override
4372    protected void onDetachedFromWindow() {
4373        super.onDetachedFromWindow();
4374
4375        final ViewTreeObserver observer = getViewTreeObserver();
4376        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4377            observer.removeOnPreDrawListener(this);
4378            mPreDrawState = PREDRAW_NOT_REGISTERED;
4379        }
4380
4381        if (mError != null) {
4382            hideError();
4383        }
4384
4385        if (mBlink != null) {
4386            mBlink.removeCallbacks(mBlink);
4387        }
4388
4389        if (mInsertionPointCursorController != null) {
4390            mInsertionPointCursorController.onDetached();
4391        }
4392
4393        if (mSelectionModifierCursorController != null) {
4394            mSelectionModifierCursorController.onDetached();
4395        }
4396
4397        hideControllers();
4398
4399        resetResolvedDrawables();
4400    }
4401
4402    @Override
4403    protected boolean isPaddingOffsetRequired() {
4404        return mShadowRadius != 0 || mDrawables != null;
4405    }
4406
4407    @Override
4408    protected int getLeftPaddingOffset() {
4409        return getCompoundPaddingLeft() - mPaddingLeft +
4410                (int) Math.min(0, mShadowDx - mShadowRadius);
4411    }
4412
4413    @Override
4414    protected int getTopPaddingOffset() {
4415        return (int) Math.min(0, mShadowDy - mShadowRadius);
4416    }
4417
4418    @Override
4419    protected int getBottomPaddingOffset() {
4420        return (int) Math.max(0, mShadowDy + mShadowRadius);
4421    }
4422
4423    @Override
4424    protected int getRightPaddingOffset() {
4425        return -(getCompoundPaddingRight() - mPaddingRight) +
4426                (int) Math.max(0, mShadowDx + mShadowRadius);
4427    }
4428
4429    @Override
4430    protected boolean verifyDrawable(Drawable who) {
4431        final boolean verified = super.verifyDrawable(who);
4432        if (!verified && mDrawables != null) {
4433            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4434                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4435                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4436        }
4437        return verified;
4438    }
4439
4440    @Override
4441    public void jumpDrawablesToCurrentState() {
4442        super.jumpDrawablesToCurrentState();
4443        if (mDrawables != null) {
4444            if (mDrawables.mDrawableLeft != null) {
4445                mDrawables.mDrawableLeft.jumpToCurrentState();
4446            }
4447            if (mDrawables.mDrawableTop != null) {
4448                mDrawables.mDrawableTop.jumpToCurrentState();
4449            }
4450            if (mDrawables.mDrawableRight != null) {
4451                mDrawables.mDrawableRight.jumpToCurrentState();
4452            }
4453            if (mDrawables.mDrawableBottom != null) {
4454                mDrawables.mDrawableBottom.jumpToCurrentState();
4455            }
4456            if (mDrawables.mDrawableStart != null) {
4457                mDrawables.mDrawableStart.jumpToCurrentState();
4458            }
4459            if (mDrawables.mDrawableEnd != null) {
4460                mDrawables.mDrawableEnd.jumpToCurrentState();
4461            }
4462        }
4463    }
4464
4465    @Override
4466    public void invalidateDrawable(Drawable drawable) {
4467        if (verifyDrawable(drawable)) {
4468            final Rect dirty = drawable.getBounds();
4469            int scrollX = mScrollX;
4470            int scrollY = mScrollY;
4471
4472            // IMPORTANT: The coordinates below are based on the coordinates computed
4473            // for each compound drawable in onDraw(). Make sure to update each section
4474            // accordingly.
4475            final TextView.Drawables drawables = mDrawables;
4476            if (drawables != null) {
4477                if (drawable == drawables.mDrawableLeft) {
4478                    final int compoundPaddingTop = getCompoundPaddingTop();
4479                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4480                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4481
4482                    scrollX += mPaddingLeft;
4483                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4484                } else if (drawable == drawables.mDrawableRight) {
4485                    final int compoundPaddingTop = getCompoundPaddingTop();
4486                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4487                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4488
4489                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4490                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4491                } else if (drawable == drawables.mDrawableTop) {
4492                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4493                    final int compoundPaddingRight = getCompoundPaddingRight();
4494                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4495
4496                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4497                    scrollY += mPaddingTop;
4498                } else if (drawable == drawables.mDrawableBottom) {
4499                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4500                    final int compoundPaddingRight = getCompoundPaddingRight();
4501                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4502
4503                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4504                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4505                }
4506            }
4507
4508            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4509                    dirty.right + scrollX, dirty.bottom + scrollY);
4510        }
4511    }
4512
4513    /**
4514     * @hide
4515     */
4516    @Override
4517    public int getResolvedLayoutDirection(Drawable who) {
4518        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4519        if (mDrawables != null) {
4520            final Drawables drawables = mDrawables;
4521            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4522                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4523                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4524                return getResolvedLayoutDirection();
4525            }
4526        }
4527        return super.getResolvedLayoutDirection(who);
4528    }
4529
4530    @Override
4531    protected boolean onSetAlpha(int alpha) {
4532        // Alpha is supported if and only if the drawing can be done in one pass.
4533        // TODO text with spans with a background color currently do not respect this alpha.
4534        if (getBackground() == null) {
4535            mCurrentAlpha = alpha;
4536            final Drawables dr = mDrawables;
4537            if (dr != null) {
4538                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4539                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4540                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4541                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4542                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4543                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4544            }
4545            return true;
4546        }
4547
4548        mCurrentAlpha = 255;
4549        return false;
4550    }
4551
4552    /**
4553     * When a TextView is used to display a useful piece of information to the user (such as a
4554     * contact's address), it should be made selectable, so that the user can select and copy this
4555     * content.
4556     *
4557     * Use {@link #setTextIsSelectable(boolean)} or the
4558     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4559     * selectable (text is not selectable by default).
4560     *
4561     * Note that this method simply returns the state of this flag. Although this flag has to be set
4562     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4563     * always be selected, independently of the value of this flag.
4564     *
4565     * @return True if the text displayed in this TextView can be selected by the user.
4566     *
4567     * @attr ref android.R.styleable#TextView_textIsSelectable
4568     */
4569    public boolean isTextSelectable() {
4570        return mTextIsSelectable;
4571    }
4572
4573    /**
4574     * Sets whether or not (default) the content of this view is selectable by the user.
4575     *
4576     * Note that this methods affect the {@link #setFocusable(boolean)},
4577     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4578     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4579     * customized.
4580     *
4581     * See {@link #isTextSelectable} for details.
4582     *
4583     * @param selectable Whether or not the content of this TextView should be selectable.
4584     */
4585    public void setTextIsSelectable(boolean selectable) {
4586        if (mTextIsSelectable == selectable) return;
4587
4588        mTextIsSelectable = selectable;
4589
4590        setFocusableInTouchMode(selectable);
4591        setFocusable(selectable);
4592        setClickable(selectable);
4593        setLongClickable(selectable);
4594
4595        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4596
4597        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4598        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4599
4600        // Called by setText above, but safer in case of future code changes
4601        prepareCursorControllers();
4602    }
4603
4604    @Override
4605    protected int[] onCreateDrawableState(int extraSpace) {
4606        final int[] drawableState;
4607
4608        if (mSingleLine) {
4609            drawableState = super.onCreateDrawableState(extraSpace);
4610        } else {
4611            drawableState = super.onCreateDrawableState(extraSpace + 1);
4612            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4613        }
4614
4615        if (mTextIsSelectable) {
4616            // Disable pressed state, which was introduced when TextView was made clickable.
4617            // Prevents text color change.
4618            // setClickable(false) would have a similar effect, but it also disables focus changes
4619            // and long press actions, which are both needed by text selection.
4620            final int length = drawableState.length;
4621            for (int i = 0; i < length; i++) {
4622                if (drawableState[i] == R.attr.state_pressed) {
4623                    final int[] nonPressedState = new int[length - 1];
4624                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4625                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4626                    return nonPressedState;
4627                }
4628            }
4629        }
4630
4631        return drawableState;
4632    }
4633
4634    @Override
4635    protected void onDraw(Canvas canvas) {
4636        if (mPreDrawState == PREDRAW_DONE) {
4637            final ViewTreeObserver observer = getViewTreeObserver();
4638            observer.removeOnPreDrawListener(this);
4639            mPreDrawState = PREDRAW_NOT_REGISTERED;
4640        }
4641
4642        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4643
4644        restartMarqueeIfNeeded();
4645
4646        // Draw the background for this view
4647        super.onDraw(canvas);
4648
4649        final int compoundPaddingLeft = getCompoundPaddingLeft();
4650        final int compoundPaddingTop = getCompoundPaddingTop();
4651        final int compoundPaddingRight = getCompoundPaddingRight();
4652        final int compoundPaddingBottom = getCompoundPaddingBottom();
4653        final int scrollX = mScrollX;
4654        final int scrollY = mScrollY;
4655        final int right = mRight;
4656        final int left = mLeft;
4657        final int bottom = mBottom;
4658        final int top = mTop;
4659
4660        final Drawables dr = mDrawables;
4661        if (dr != null) {
4662            /*
4663             * Compound, not extended, because the icon is not clipped
4664             * if the text height is smaller.
4665             */
4666
4667            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4668            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4669
4670            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4671            // Make sure to update invalidateDrawable() when changing this code.
4672            if (dr.mDrawableLeft != null) {
4673                canvas.save();
4674                canvas.translate(scrollX + mPaddingLeft,
4675                                 scrollY + compoundPaddingTop +
4676                                 (vspace - dr.mDrawableHeightLeft) / 2);
4677                dr.mDrawableLeft.draw(canvas);
4678                canvas.restore();
4679            }
4680
4681            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4682            // Make sure to update invalidateDrawable() when changing this code.
4683            if (dr.mDrawableRight != null) {
4684                canvas.save();
4685                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4686                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4687                dr.mDrawableRight.draw(canvas);
4688                canvas.restore();
4689            }
4690
4691            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4692            // Make sure to update invalidateDrawable() when changing this code.
4693            if (dr.mDrawableTop != null) {
4694                canvas.save();
4695                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4696                        scrollY + mPaddingTop);
4697                dr.mDrawableTop.draw(canvas);
4698                canvas.restore();
4699            }
4700
4701            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4702            // Make sure to update invalidateDrawable() when changing this code.
4703            if (dr.mDrawableBottom != null) {
4704                canvas.save();
4705                canvas.translate(scrollX + compoundPaddingLeft +
4706                        (hspace - dr.mDrawableWidthBottom) / 2,
4707                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4708                dr.mDrawableBottom.draw(canvas);
4709                canvas.restore();
4710            }
4711        }
4712
4713        int color = mCurTextColor;
4714
4715        if (mLayout == null) {
4716            assumeLayout();
4717        }
4718
4719        Layout layout = mLayout;
4720        int cursorcolor = color;
4721
4722        if (mHint != null && mText.length() == 0) {
4723            if (mHintTextColor != null) {
4724                color = mCurHintTextColor;
4725            }
4726
4727            layout = mHintLayout;
4728        }
4729
4730        mTextPaint.setColor(color);
4731        if (mCurrentAlpha != 255) {
4732            // If set, the alpha will override the color's alpha. Multiply the alphas.
4733            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4734        }
4735        mTextPaint.drawableState = getDrawableState();
4736
4737        canvas.save();
4738        /*  Would be faster if we didn't have to do this. Can we chop the
4739            (displayable) text so that we don't need to do this ever?
4740        */
4741
4742        int extendedPaddingTop = getExtendedPaddingTop();
4743        int extendedPaddingBottom = getExtendedPaddingBottom();
4744
4745        float clipLeft = compoundPaddingLeft + scrollX;
4746        float clipTop = extendedPaddingTop + scrollY;
4747        float clipRight = right - left - compoundPaddingRight + scrollX;
4748        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4749
4750        if (mShadowRadius != 0) {
4751            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4752            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4753
4754            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4755            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4756        }
4757
4758        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4759
4760        int voffsetText = 0;
4761        int voffsetCursor = 0;
4762
4763        // translate in by our padding
4764        {
4765            /* shortcircuit calling getVerticaOffset() */
4766            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4767                voffsetText = getVerticalOffset(false);
4768                voffsetCursor = getVerticalOffset(true);
4769            }
4770            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4771        }
4772
4773        final int layoutDirection = getResolvedLayoutDirection();
4774        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4775        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4776            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4777                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4778                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4779                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4780            }
4781
4782            if (mMarquee != null && mMarquee.isRunning()) {
4783                canvas.translate(-mMarquee.mScroll, 0.0f);
4784            }
4785        }
4786
4787        Path highlight = null;
4788        int selStart = -1, selEnd = -1;
4789        boolean drawCursor = false;
4790
4791        //  If there is no movement method, then there can be no selection.
4792        //  Check that first and attempt to skip everything having to do with
4793        //  the cursor.
4794        //  XXX This is not strictly true -- a program could set the
4795        //  selection manually if it really wanted to.
4796        if (mMovement != null && (isFocused() || isPressed())) {
4797            selStart = getSelectionStart();
4798            selEnd = getSelectionEnd();
4799
4800            if (selStart >= 0) {
4801                if (mHighlightPath == null)
4802                    mHighlightPath = new Path();
4803
4804                if (selStart == selEnd) {
4805                    if (isCursorVisible() &&
4806                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4807                        if (mHighlightPathBogus) {
4808                            mHighlightPath.reset();
4809                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4810                            updateCursorsPositions();
4811                            mHighlightPathBogus = false;
4812                        }
4813
4814                        // XXX should pass to skin instead of drawing directly
4815                        mHighlightPaint.setColor(cursorcolor);
4816                        if (mCurrentAlpha != 255) {
4817                            mHighlightPaint.setAlpha(
4818                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4819                        }
4820                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4821                        highlight = mHighlightPath;
4822                        drawCursor = mCursorCount > 0;
4823                    }
4824                } else if (textCanBeSelected()) {
4825                    if (mHighlightPathBogus) {
4826                        mHighlightPath.reset();
4827                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4828                        mHighlightPathBogus = false;
4829                    }
4830
4831                    // XXX should pass to skin instead of drawing directly
4832                    mHighlightPaint.setColor(mHighlightColor);
4833                    if (mCurrentAlpha != 255) {
4834                        mHighlightPaint.setAlpha(
4835                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4836                    }
4837                    mHighlightPaint.setStyle(Paint.Style.FILL);
4838
4839                    highlight = mHighlightPath;
4840                }
4841            }
4842        }
4843
4844        /*  Comment out until we decide what to do about animations
4845        boolean isLinearTextOn = false;
4846        if (currentTransformation != null) {
4847            isLinearTextOn = mTextPaint.isLinearTextOn();
4848            Matrix m = currentTransformation.getMatrix();
4849            if (!m.isIdentity()) {
4850                // mTextPaint.setLinearTextOn(true);
4851            }
4852        }
4853        */
4854
4855        final InputMethodState ims = mInputMethodState;
4856        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4857        if (ims != null && ims.mBatchEditNesting == 0) {
4858            InputMethodManager imm = InputMethodManager.peekInstance();
4859            if (imm != null) {
4860                if (imm.isActive(this)) {
4861                    boolean reported = false;
4862                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4863                        // We are in extract mode and the content has changed
4864                        // in some way... just report complete new text to the
4865                        // input method.
4866                        reported = reportExtractedText();
4867                    }
4868                    if (!reported && highlight != null) {
4869                        int candStart = -1;
4870                        int candEnd = -1;
4871                        if (mText instanceof Spannable) {
4872                            Spannable sp = (Spannable)mText;
4873                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4874                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4875                        }
4876                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4877                    }
4878                }
4879
4880                if (imm.isWatchingCursor(this) && highlight != null) {
4881                    highlight.computeBounds(ims.mTmpRectF, true);
4882                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4883
4884                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4885                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4886
4887                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4888
4889                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4890                            (int)(ims.mTmpRectF.top + 0.5),
4891                            (int)(ims.mTmpRectF.right + 0.5),
4892                            (int)(ims.mTmpRectF.bottom + 0.5));
4893
4894                    imm.updateCursor(this,
4895                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4896                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4897                }
4898            }
4899        }
4900
4901        if (mCorrectionHighlighter != null) {
4902            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4903        }
4904
4905        if (drawCursor) {
4906            drawCursor(canvas, cursorOffsetVertical);
4907            // Rely on the drawable entirely, do not draw the cursor line.
4908            // Has to be done after the IMM related code above which relies on the highlight.
4909            highlight = null;
4910        }
4911
4912        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4913
4914        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4915            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4916            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4917        }
4918
4919        /*  Comment out until we decide what to do about animations
4920        if (currentTransformation != null) {
4921            mTextPaint.setLinearTextOn(isLinearTextOn);
4922        }
4923        */
4924
4925        canvas.restore();
4926    }
4927
4928    private void updateCursorsPositions() {
4929        if (mCursorDrawableRes == 0) {
4930            mCursorCount = 0;
4931            return;
4932        }
4933
4934        final int offset = getSelectionStart();
4935        final int line = mLayout.getLineForOffset(offset);
4936        final int top = mLayout.getLineTop(line);
4937        final int bottom = mLayout.getLineTop(line + 1);
4938
4939        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
4940
4941        int middle = bottom;
4942        if (mCursorCount == 2) {
4943            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
4944            middle = (top + bottom) >> 1;
4945        }
4946
4947        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
4948
4949        if (mCursorCount == 2) {
4950            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
4951        }
4952    }
4953
4954    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
4955        if (mCursorDrawable[cursorIndex] == null)
4956            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
4957
4958        if (mTempRect == null) mTempRect = new Rect();
4959
4960        mCursorDrawable[cursorIndex].getPadding(mTempRect);
4961        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
4962        horizontal = Math.max(0.5f, horizontal - 0.5f);
4963        final int left = (int) (horizontal) - mTempRect.left;
4964        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
4965                bottom + mTempRect.bottom);
4966    }
4967
4968    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
4969        final boolean translate = cursorOffsetVertical != 0;
4970        if (translate) canvas.translate(0, cursorOffsetVertical);
4971        for (int i = 0; i < mCursorCount; i++) {
4972            mCursorDrawable[i].draw(canvas);
4973        }
4974        if (translate) canvas.translate(0, -cursorOffsetVertical);
4975    }
4976
4977    @Override
4978    public void getFocusedRect(Rect r) {
4979        if (mLayout == null) {
4980            super.getFocusedRect(r);
4981            return;
4982        }
4983
4984        int sel = getSelectionEnd();
4985        if (sel < 0) {
4986            super.getFocusedRect(r);
4987            return;
4988        }
4989
4990        int line = mLayout.getLineForOffset(sel);
4991        r.top = mLayout.getLineTop(line);
4992        r.bottom = mLayout.getLineBottom(line);
4993
4994        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4995        r.right = r.left + 1;
4996
4997        // Adjust for padding and gravity.
4998        int paddingLeft = getCompoundPaddingLeft();
4999        int paddingTop = getExtendedPaddingTop();
5000        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5001            paddingTop += getVerticalOffset(false);
5002        }
5003        r.offset(paddingLeft, paddingTop);
5004    }
5005
5006    /**
5007     * Return the number of lines of text, or 0 if the internal Layout has not
5008     * been built.
5009     */
5010    public int getLineCount() {
5011        return mLayout != null ? mLayout.getLineCount() : 0;
5012    }
5013
5014    /**
5015     * Return the baseline for the specified line (0...getLineCount() - 1)
5016     * If bounds is not null, return the top, left, right, bottom extents
5017     * of the specified line in it. If the internal Layout has not been built,
5018     * return 0 and set bounds to (0, 0, 0, 0)
5019     * @param line which line to examine (0..getLineCount() - 1)
5020     * @param bounds Optional. If not null, it returns the extent of the line
5021     * @return the Y-coordinate of the baseline
5022     */
5023    public int getLineBounds(int line, Rect bounds) {
5024        if (mLayout == null) {
5025            if (bounds != null) {
5026                bounds.set(0, 0, 0, 0);
5027            }
5028            return 0;
5029        }
5030        else {
5031            int baseline = mLayout.getLineBounds(line, bounds);
5032
5033            int voffset = getExtendedPaddingTop();
5034            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5035                voffset += getVerticalOffset(true);
5036            }
5037            if (bounds != null) {
5038                bounds.offset(getCompoundPaddingLeft(), voffset);
5039            }
5040            return baseline + voffset;
5041        }
5042    }
5043
5044    @Override
5045    public int getBaseline() {
5046        if (mLayout == null) {
5047            return super.getBaseline();
5048        }
5049
5050        int voffset = 0;
5051        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5052            voffset = getVerticalOffset(true);
5053        }
5054
5055        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5056    }
5057
5058    @Override
5059    public boolean onKeyDown(int keyCode, KeyEvent event) {
5060        int which = doKeyDown(keyCode, event, null);
5061        if (which == 0) {
5062            // Go through default dispatching.
5063            return super.onKeyDown(keyCode, event);
5064        }
5065
5066        return true;
5067    }
5068
5069    @Override
5070    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5071        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5072
5073        int which = doKeyDown(keyCode, down, event);
5074        if (which == 0) {
5075            // Go through default dispatching.
5076            return super.onKeyMultiple(keyCode, repeatCount, event);
5077        }
5078        if (which == -1) {
5079            // Consumed the whole thing.
5080            return true;
5081        }
5082
5083        repeatCount--;
5084
5085        // We are going to dispatch the remaining events to either the input
5086        // or movement method.  To do this, we will just send a repeated stream
5087        // of down and up events until we have done the complete repeatCount.
5088        // It would be nice if those interfaces had an onKeyMultiple() method,
5089        // but adding that is a more complicated change.
5090        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5091        if (which == 1) {
5092            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5093            while (--repeatCount > 0) {
5094                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5095                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5096            }
5097            hideErrorIfUnchanged();
5098
5099        } else if (which == 2) {
5100            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5101            while (--repeatCount > 0) {
5102                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5103                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5104            }
5105        }
5106
5107        return true;
5108    }
5109
5110    /**
5111     * Returns true if pressing ENTER in this field advances focus instead
5112     * of inserting the character.  This is true mostly in single-line fields,
5113     * but also in mail addresses and subjects which will display on multiple
5114     * lines but where it doesn't make sense to insert newlines.
5115     */
5116    private boolean shouldAdvanceFocusOnEnter() {
5117        if (mInput == null) {
5118            return false;
5119        }
5120
5121        if (mSingleLine) {
5122            return true;
5123        }
5124
5125        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5126            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5127            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5128                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5129                return true;
5130            }
5131        }
5132
5133        return false;
5134    }
5135
5136    /**
5137     * Returns true if pressing TAB in this field advances focus instead
5138     * of inserting the character.  Insert tabs only in multi-line editors.
5139     */
5140    private boolean shouldAdvanceFocusOnTab() {
5141        if (mInput != null && !mSingleLine) {
5142            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5143                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5144                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5145                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5146                    return false;
5147                }
5148            }
5149        }
5150        return true;
5151    }
5152
5153    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5154        if (!isEnabled()) {
5155            return 0;
5156        }
5157
5158        switch (keyCode) {
5159            case KeyEvent.KEYCODE_ENTER:
5160                mEnterKeyIsDown = true;
5161                if (event.hasNoModifiers()) {
5162                    // When mInputContentType is set, we know that we are
5163                    // running in a "modern" cupcake environment, so don't need
5164                    // to worry about the application trying to capture
5165                    // enter key events.
5166                    if (mInputContentType != null) {
5167                        // If there is an action listener, given them a
5168                        // chance to consume the event.
5169                        if (mInputContentType.onEditorActionListener != null &&
5170                                mInputContentType.onEditorActionListener.onEditorAction(
5171                                this, EditorInfo.IME_NULL, event)) {
5172                            mInputContentType.enterDown = true;
5173                            // We are consuming the enter key for them.
5174                            return -1;
5175                        }
5176                    }
5177
5178                    // If our editor should move focus when enter is pressed, or
5179                    // this is a generated event from an IME action button, then
5180                    // don't let it be inserted into the text.
5181                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5182                            || shouldAdvanceFocusOnEnter()) {
5183                        if (mOnClickListener != null) {
5184                            return 0;
5185                        }
5186                        return -1;
5187                    }
5188                }
5189                break;
5190
5191            case KeyEvent.KEYCODE_DPAD_CENTER:
5192                mDPadCenterIsDown = true;
5193                if (event.hasNoModifiers()) {
5194                    if (shouldAdvanceFocusOnEnter()) {
5195                        return 0;
5196                    }
5197                }
5198                break;
5199
5200            case KeyEvent.KEYCODE_TAB:
5201                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5202                    if (shouldAdvanceFocusOnTab()) {
5203                        return 0;
5204                    }
5205                }
5206                break;
5207
5208                // Has to be done on key down (and not on key up) to correctly be intercepted.
5209            case KeyEvent.KEYCODE_BACK:
5210                if (mSelectionActionMode != null) {
5211                    stopSelectionActionMode();
5212                    return -1;
5213                }
5214                break;
5215        }
5216
5217        if (mInput != null) {
5218            resetErrorChangedFlag();
5219
5220            boolean doDown = true;
5221            if (otherEvent != null) {
5222                try {
5223                    beginBatchEdit();
5224                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5225                    hideErrorIfUnchanged();
5226                    doDown = false;
5227                    if (handled) {
5228                        return -1;
5229                    }
5230                } catch (AbstractMethodError e) {
5231                    // onKeyOther was added after 1.0, so if it isn't
5232                    // implemented we need to try to dispatch as a regular down.
5233                } finally {
5234                    endBatchEdit();
5235                }
5236            }
5237
5238            if (doDown) {
5239                beginBatchEdit();
5240                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5241                endBatchEdit();
5242                hideErrorIfUnchanged();
5243                if (handled) return 1;
5244            }
5245        }
5246
5247        // bug 650865: sometimes we get a key event before a layout.
5248        // don't try to move around if we don't know the layout.
5249
5250        if (mMovement != null && mLayout != null) {
5251            boolean doDown = true;
5252            if (otherEvent != null) {
5253                try {
5254                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5255                            otherEvent);
5256                    doDown = false;
5257                    if (handled) {
5258                        return -1;
5259                    }
5260                } catch (AbstractMethodError e) {
5261                    // onKeyOther was added after 1.0, so if it isn't
5262                    // implemented we need to try to dispatch as a regular down.
5263                }
5264            }
5265            if (doDown) {
5266                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5267                    return 2;
5268            }
5269        }
5270
5271        return 0;
5272    }
5273
5274    /**
5275     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5276     * can be recorded.
5277     * @hide
5278     */
5279    public void resetErrorChangedFlag() {
5280        /*
5281         * Keep track of what the error was before doing the input
5282         * so that if an input filter changed the error, we leave
5283         * that error showing.  Otherwise, we take down whatever
5284         * error was showing when the user types something.
5285         */
5286        mErrorWasChanged = false;
5287    }
5288
5289    /**
5290     * @hide
5291     */
5292    public void hideErrorIfUnchanged() {
5293        if (mError != null && !mErrorWasChanged) {
5294            setError(null, null);
5295        }
5296    }
5297
5298    @Override
5299    public boolean onKeyUp(int keyCode, KeyEvent event) {
5300        if (!isEnabled()) {
5301            return super.onKeyUp(keyCode, event);
5302        }
5303
5304        switch (keyCode) {
5305            case KeyEvent.KEYCODE_DPAD_CENTER:
5306                mDPadCenterIsDown = false;
5307                if (event.hasNoModifiers()) {
5308                    /*
5309                     * If there is a click listener, just call through to
5310                     * super, which will invoke it.
5311                     *
5312                     * If there isn't a click listener, try to show the soft
5313                     * input method.  (It will also
5314                     * call performClick(), but that won't do anything in
5315                     * this case.)
5316                     */
5317                    if (mOnClickListener == null) {
5318                        if (mMovement != null && mText instanceof Editable
5319                                && mLayout != null && onCheckIsTextEditor()) {
5320                            InputMethodManager imm = InputMethodManager.peekInstance();
5321                            if (imm != null) {
5322                                imm.viewClicked(this);
5323                                imm.showSoftInput(this, 0);
5324                            }
5325                        }
5326                    }
5327                }
5328                return super.onKeyUp(keyCode, event);
5329
5330            case KeyEvent.KEYCODE_ENTER:
5331                mEnterKeyIsDown = false;
5332                if (event.hasNoModifiers()) {
5333                    if (mInputContentType != null
5334                            && mInputContentType.onEditorActionListener != null
5335                            && mInputContentType.enterDown) {
5336                        mInputContentType.enterDown = false;
5337                        if (mInputContentType.onEditorActionListener.onEditorAction(
5338                                this, EditorInfo.IME_NULL, event)) {
5339                            return true;
5340                        }
5341                    }
5342
5343                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5344                            || shouldAdvanceFocusOnEnter()) {
5345                        /*
5346                         * If there is a click listener, just call through to
5347                         * super, which will invoke it.
5348                         *
5349                         * If there isn't a click listener, try to advance focus,
5350                         * but still call through to super, which will reset the
5351                         * pressed state and longpress state.  (It will also
5352                         * call performClick(), but that won't do anything in
5353                         * this case.)
5354                         */
5355                        if (mOnClickListener == null) {
5356                            View v = focusSearch(FOCUS_DOWN);
5357
5358                            if (v != null) {
5359                                if (!v.requestFocus(FOCUS_DOWN)) {
5360                                    throw new IllegalStateException(
5361                                            "focus search returned a view " +
5362                                            "that wasn't able to take focus!");
5363                                }
5364
5365                                /*
5366                                 * Return true because we handled the key; super
5367                                 * will return false because there was no click
5368                                 * listener.
5369                                 */
5370                                super.onKeyUp(keyCode, event);
5371                                return true;
5372                            } else if ((event.getFlags()
5373                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5374                                // No target for next focus, but make sure the IME
5375                                // if this came from it.
5376                                InputMethodManager imm = InputMethodManager.peekInstance();
5377                                if (imm != null && imm.isActive(this)) {
5378                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5379                                }
5380                            }
5381                        }
5382                    }
5383                    return super.onKeyUp(keyCode, event);
5384                }
5385                break;
5386        }
5387
5388        if (mInput != null)
5389            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5390                return true;
5391
5392        if (mMovement != null && mLayout != null)
5393            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5394                return true;
5395
5396        return super.onKeyUp(keyCode, event);
5397    }
5398
5399    @Override public boolean onCheckIsTextEditor() {
5400        return mInputType != EditorInfo.TYPE_NULL;
5401    }
5402
5403    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5404        if (onCheckIsTextEditor() && isEnabled()) {
5405            if (mInputMethodState == null) {
5406                mInputMethodState = new InputMethodState();
5407            }
5408            outAttrs.inputType = mInputType;
5409            if (mInputContentType != null) {
5410                outAttrs.imeOptions = mInputContentType.imeOptions;
5411                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5412                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5413                outAttrs.actionId = mInputContentType.imeActionId;
5414                outAttrs.extras = mInputContentType.extras;
5415            } else {
5416                outAttrs.imeOptions = EditorInfo.IME_NULL;
5417            }
5418            if (focusSearch(FOCUS_DOWN) != null) {
5419                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5420            }
5421            if (focusSearch(FOCUS_UP) != null) {
5422                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5423            }
5424            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5425                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5426                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5427                    // An action has not been set, but the enter key will move to
5428                    // the next focus, so set the action to that.
5429                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5430                } else {
5431                    // An action has not been set, and there is no focus to move
5432                    // to, so let's just supply a "done" action.
5433                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5434                }
5435                if (!shouldAdvanceFocusOnEnter()) {
5436                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5437                }
5438            }
5439            if (isMultilineInputType(outAttrs.inputType)) {
5440                // Multi-line text editors should always show an enter key.
5441                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5442            }
5443            outAttrs.hintText = mHint;
5444            if (mText instanceof Editable) {
5445                InputConnection ic = new EditableInputConnection(this);
5446                outAttrs.initialSelStart = getSelectionStart();
5447                outAttrs.initialSelEnd = getSelectionEnd();
5448                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5449                return ic;
5450            }
5451        }
5452        return null;
5453    }
5454
5455    /**
5456     * If this TextView contains editable content, extract a portion of it
5457     * based on the information in <var>request</var> in to <var>outText</var>.
5458     * @return Returns true if the text was successfully extracted, else false.
5459     */
5460    public boolean extractText(ExtractedTextRequest request,
5461            ExtractedText outText) {
5462        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5463                EXTRACT_UNKNOWN, outText);
5464    }
5465
5466    static final int EXTRACT_NOTHING = -2;
5467    static final int EXTRACT_UNKNOWN = -1;
5468
5469    boolean extractTextInternal(ExtractedTextRequest request,
5470            int partialStartOffset, int partialEndOffset, int delta,
5471            ExtractedText outText) {
5472        final CharSequence content = mText;
5473        if (content != null) {
5474            if (partialStartOffset != EXTRACT_NOTHING) {
5475                final int N = content.length();
5476                if (partialStartOffset < 0) {
5477                    outText.partialStartOffset = outText.partialEndOffset = -1;
5478                    partialStartOffset = 0;
5479                    partialEndOffset = N;
5480                } else {
5481                    // Now use the delta to determine the actual amount of text
5482                    // we need.
5483                    partialEndOffset += delta;
5484                    // Adjust offsets to ensure we contain full spans.
5485                    if (content instanceof Spanned) {
5486                        Spanned spanned = (Spanned)content;
5487                        Object[] spans = spanned.getSpans(partialStartOffset,
5488                                partialEndOffset, ParcelableSpan.class);
5489                        int i = spans.length;
5490                        while (i > 0) {
5491                            i--;
5492                            int j = spanned.getSpanStart(spans[i]);
5493                            if (j < partialStartOffset) partialStartOffset = j;
5494                            j = spanned.getSpanEnd(spans[i]);
5495                            if (j > partialEndOffset) partialEndOffset = j;
5496                        }
5497                    }
5498                    outText.partialStartOffset = partialStartOffset;
5499                    outText.partialEndOffset = partialEndOffset - delta;
5500
5501                    if (partialStartOffset > N) {
5502                        partialStartOffset = N;
5503                    } else if (partialStartOffset < 0) {
5504                        partialStartOffset = 0;
5505                    }
5506                    if (partialEndOffset > N) {
5507                        partialEndOffset = N;
5508                    } else if (partialEndOffset < 0) {
5509                        partialEndOffset = 0;
5510                    }
5511                }
5512                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5513                    outText.text = content.subSequence(partialStartOffset,
5514                            partialEndOffset);
5515                } else {
5516                    outText.text = TextUtils.substring(content, partialStartOffset,
5517                            partialEndOffset);
5518                }
5519            } else {
5520                outText.partialStartOffset = 0;
5521                outText.partialEndOffset = 0;
5522                outText.text = "";
5523            }
5524            outText.flags = 0;
5525            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5526                outText.flags |= ExtractedText.FLAG_SELECTING;
5527            }
5528            if (mSingleLine) {
5529                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5530            }
5531            outText.startOffset = 0;
5532            outText.selectionStart = getSelectionStart();
5533            outText.selectionEnd = getSelectionEnd();
5534            return true;
5535        }
5536        return false;
5537    }
5538
5539    boolean reportExtractedText() {
5540        final InputMethodState ims = mInputMethodState;
5541        if (ims != null) {
5542            final boolean contentChanged = ims.mContentChanged;
5543            if (contentChanged || ims.mSelectionModeChanged) {
5544                ims.mContentChanged = false;
5545                ims.mSelectionModeChanged = false;
5546                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5547                if (req != null) {
5548                    InputMethodManager imm = InputMethodManager.peekInstance();
5549                    if (imm != null) {
5550                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5551                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5552                                + " delta=" + ims.mChangedDelta);
5553                        if (ims.mChangedStart < 0 && !contentChanged) {
5554                            ims.mChangedStart = EXTRACT_NOTHING;
5555                        }
5556                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5557                                ims.mChangedDelta, ims.mTmpExtracted)) {
5558                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5559                                    + ims.mTmpExtracted.partialStartOffset
5560                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5561                                    + ": " + ims.mTmpExtracted.text);
5562                            imm.updateExtractedText(this, req.token,
5563                                    mInputMethodState.mTmpExtracted);
5564                            ims.mChangedStart = EXTRACT_UNKNOWN;
5565                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5566                            ims.mChangedDelta = 0;
5567                            ims.mContentChanged = false;
5568                            return true;
5569                        }
5570                    }
5571                }
5572            }
5573        }
5574        return false;
5575    }
5576
5577    /**
5578     * This is used to remove all style-impacting spans from text before new
5579     * extracted text is being replaced into it, so that we don't have any
5580     * lingering spans applied during the replace.
5581     */
5582    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5583        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5584        int i = spans.length;
5585        while (i > 0) {
5586            i--;
5587            spannable.removeSpan(spans[i]);
5588        }
5589    }
5590
5591    /**
5592     * Apply to this text view the given extracted text, as previously
5593     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5594     */
5595    public void setExtractedText(ExtractedText text) {
5596        Editable content = getEditableText();
5597        if (text.text != null) {
5598            if (content == null) {
5599                setText(text.text, TextView.BufferType.EDITABLE);
5600            } else if (text.partialStartOffset < 0) {
5601                removeParcelableSpans(content, 0, content.length());
5602                content.replace(0, content.length(), text.text);
5603            } else {
5604                final int N = content.length();
5605                int start = text.partialStartOffset;
5606                if (start > N) start = N;
5607                int end = text.partialEndOffset;
5608                if (end > N) end = N;
5609                removeParcelableSpans(content, start, end);
5610                content.replace(start, end, text.text);
5611            }
5612        }
5613
5614        // Now set the selection position...  make sure it is in range, to
5615        // avoid crashes.  If this is a partial update, it is possible that
5616        // the underlying text may have changed, causing us problems here.
5617        // Also we just don't want to trust clients to do the right thing.
5618        Spannable sp = (Spannable)getText();
5619        final int N = sp.length();
5620        int start = text.selectionStart;
5621        if (start < 0) start = 0;
5622        else if (start > N) start = N;
5623        int end = text.selectionEnd;
5624        if (end < 0) end = 0;
5625        else if (end > N) end = N;
5626        Selection.setSelection(sp, start, end);
5627
5628        // Finally, update the selection mode.
5629        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5630            MetaKeyKeyListener.startSelecting(this, sp);
5631        } else {
5632            MetaKeyKeyListener.stopSelecting(this, sp);
5633        }
5634    }
5635
5636    /**
5637     * @hide
5638     */
5639    public void setExtracting(ExtractedTextRequest req) {
5640        if (mInputMethodState != null) {
5641            mInputMethodState.mExtracting = req;
5642        }
5643        // This stops a possible text selection mode. Maybe not intended.
5644        hideControllers();
5645    }
5646
5647    /**
5648     * Called by the framework in response to a text completion from
5649     * the current input method, provided by it calling
5650     * {@link InputConnection#commitCompletion
5651     * InputConnection.commitCompletion()}.  The default implementation does
5652     * nothing; text views that are supporting auto-completion should override
5653     * this to do their desired behavior.
5654     *
5655     * @param text The auto complete text the user has selected.
5656     */
5657    public void onCommitCompletion(CompletionInfo text) {
5658        // intentionally empty
5659    }
5660
5661    /**
5662     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5663     * a dictionnary) from the current input method, provided by it calling
5664     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5665     * implementation flashes the background of the corrected word to provide feedback to the user.
5666     *
5667     * @param info The auto correct info about the text that was corrected.
5668     */
5669    public void onCommitCorrection(CorrectionInfo info) {
5670        if (mCorrectionHighlighter == null) {
5671            mCorrectionHighlighter = new CorrectionHighlighter();
5672        } else {
5673            mCorrectionHighlighter.invalidate(false);
5674        }
5675
5676        mCorrectionHighlighter.highlight(info);
5677    }
5678
5679    private class CorrectionHighlighter {
5680        private final Path mPath = new Path();
5681        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5682        private int mStart, mEnd;
5683        private long mFadingStartTime;
5684        private final static int FADE_OUT_DURATION = 400;
5685
5686        public CorrectionHighlighter() {
5687            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5688            mPaint.setStyle(Paint.Style.FILL);
5689        }
5690
5691        public void highlight(CorrectionInfo info) {
5692            mStart = info.getOffset();
5693            mEnd = mStart + info.getNewText().length();
5694            mFadingStartTime = SystemClock.uptimeMillis();
5695
5696            if (mStart < 0 || mEnd < 0) {
5697                stopAnimation();
5698            }
5699        }
5700
5701        public void draw(Canvas canvas, int cursorOffsetVertical) {
5702            if (updatePath() && updatePaint()) {
5703                if (cursorOffsetVertical != 0) {
5704                    canvas.translate(0, cursorOffsetVertical);
5705                }
5706
5707                canvas.drawPath(mPath, mPaint);
5708
5709                if (cursorOffsetVertical != 0) {
5710                    canvas.translate(0, -cursorOffsetVertical);
5711                }
5712                invalidate(true);
5713            } else {
5714                stopAnimation();
5715                invalidate(false);
5716            }
5717        }
5718
5719        private boolean updatePaint() {
5720            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5721            if (duration > FADE_OUT_DURATION) return false;
5722
5723            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5724            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5725            final int color = (mHighlightColor & 0x00FFFFFF) +
5726                    ((int) (highlightColorAlpha * coef) << 24);
5727            mPaint.setColor(color);
5728            return true;
5729        }
5730
5731        private boolean updatePath() {
5732            final Layout layout = TextView.this.mLayout;
5733            if (layout == null) return false;
5734
5735            // Update in case text is edited while the animation is run
5736            final int length = mText.length();
5737            int start = Math.min(length, mStart);
5738            int end = Math.min(length, mEnd);
5739
5740            mPath.reset();
5741            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5742            return true;
5743        }
5744
5745        private void invalidate(boolean delayed) {
5746            if (TextView.this.mLayout == null) return;
5747
5748            synchronized (sTempRect) {
5749                mPath.computeBounds(sTempRect, false);
5750
5751                int left = getCompoundPaddingLeft();
5752                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5753
5754                if (delayed) {
5755                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5756                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5757                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5758                } else {
5759                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5760                            (int) sTempRect.right, (int) sTempRect.bottom);
5761                }
5762            }
5763        }
5764
5765        private void stopAnimation() {
5766            TextView.this.mCorrectionHighlighter = null;
5767        }
5768    }
5769
5770    public void beginBatchEdit() {
5771        mInBatchEditControllers = true;
5772        final InputMethodState ims = mInputMethodState;
5773        if (ims != null) {
5774            int nesting = ++ims.mBatchEditNesting;
5775            if (nesting == 1) {
5776                ims.mCursorChanged = false;
5777                ims.mChangedDelta = 0;
5778                if (ims.mContentChanged) {
5779                    // We already have a pending change from somewhere else,
5780                    // so turn this into a full update.
5781                    ims.mChangedStart = 0;
5782                    ims.mChangedEnd = mText.length();
5783                } else {
5784                    ims.mChangedStart = EXTRACT_UNKNOWN;
5785                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5786                    ims.mContentChanged = false;
5787                }
5788                onBeginBatchEdit();
5789            }
5790        }
5791    }
5792
5793    public void endBatchEdit() {
5794        mInBatchEditControllers = false;
5795        final InputMethodState ims = mInputMethodState;
5796        if (ims != null) {
5797            int nesting = --ims.mBatchEditNesting;
5798            if (nesting == 0) {
5799                finishBatchEdit(ims);
5800            }
5801        }
5802    }
5803
5804    void ensureEndedBatchEdit() {
5805        final InputMethodState ims = mInputMethodState;
5806        if (ims != null && ims.mBatchEditNesting != 0) {
5807            ims.mBatchEditNesting = 0;
5808            finishBatchEdit(ims);
5809        }
5810    }
5811
5812    void finishBatchEdit(final InputMethodState ims) {
5813        onEndBatchEdit();
5814
5815        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5816            updateAfterEdit();
5817            reportExtractedText();
5818        } else if (ims.mCursorChanged) {
5819            // Cheezy way to get us to report the current cursor location.
5820            invalidateCursor();
5821        }
5822    }
5823
5824    void updateAfterEdit() {
5825        invalidate();
5826        int curs = getSelectionStart();
5827
5828        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5829            registerForPreDraw();
5830        }
5831
5832        if (curs >= 0) {
5833            mHighlightPathBogus = true;
5834            makeBlink();
5835            bringPointIntoView(curs);
5836        }
5837
5838        checkForResize();
5839    }
5840
5841    /**
5842     * Called by the framework in response to a request to begin a batch
5843     * of edit operations through a call to link {@link #beginBatchEdit()}.
5844     */
5845    public void onBeginBatchEdit() {
5846        // intentionally empty
5847    }
5848
5849    /**
5850     * Called by the framework in response to a request to end a batch
5851     * of edit operations through a call to link {@link #endBatchEdit}.
5852     */
5853    public void onEndBatchEdit() {
5854        // intentionally empty
5855    }
5856
5857    /**
5858     * Called by the framework in response to a private command from the
5859     * current method, provided by it calling
5860     * {@link InputConnection#performPrivateCommand
5861     * InputConnection.performPrivateCommand()}.
5862     *
5863     * @param action The action name of the command.
5864     * @param data Any additional data for the command.  This may be null.
5865     * @return Return true if you handled the command, else false.
5866     */
5867    public boolean onPrivateIMECommand(String action, Bundle data) {
5868        return false;
5869    }
5870
5871    private void nullLayouts() {
5872        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5873            mSavedLayout = (BoringLayout) mLayout;
5874        }
5875        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5876            mSavedHintLayout = (BoringLayout) mHintLayout;
5877        }
5878
5879        mLayout = mHintLayout = null;
5880
5881        // Since it depends on the value of mLayout
5882        prepareCursorControllers();
5883    }
5884
5885    /**
5886     * Make a new Layout based on the already-measured size of the view,
5887     * on the assumption that it was measured correctly at some point.
5888     */
5889    private void assumeLayout() {
5890        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5891
5892        if (width < 1) {
5893            width = 0;
5894        }
5895
5896        int physicalWidth = width;
5897
5898        if (mHorizontallyScrolling) {
5899            width = VERY_WIDE;
5900        }
5901
5902        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5903                      physicalWidth, false);
5904    }
5905
5906    @Override
5907    protected void resetResolvedLayoutDirection() {
5908        super.resetResolvedLayoutDirection();
5909
5910        if (mLayoutAlignment != null &&
5911                (mTextAlign == TextAlign.VIEW_START ||
5912                mTextAlign == TextAlign.VIEW_END)) {
5913            mLayoutAlignment = null;
5914        }
5915    }
5916
5917    private Layout.Alignment getLayoutAlignment() {
5918        if (mLayoutAlignment == null) {
5919            Layout.Alignment alignment;
5920            TextAlign textAlign = mTextAlign;
5921            switch (textAlign) {
5922                case INHERIT:
5923                    // fall through to gravity temporarily
5924                    // intention is to inherit value through view hierarchy.
5925                case GRAVITY:
5926                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
5927                        case Gravity.START:
5928                            alignment = Layout.Alignment.ALIGN_NORMAL;
5929                            break;
5930                        case Gravity.END:
5931                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
5932                            break;
5933                        case Gravity.LEFT:
5934                            alignment = Layout.Alignment.ALIGN_LEFT;
5935                            break;
5936                        case Gravity.RIGHT:
5937                            alignment = Layout.Alignment.ALIGN_RIGHT;
5938                            break;
5939                        case Gravity.CENTER_HORIZONTAL:
5940                            alignment = Layout.Alignment.ALIGN_CENTER;
5941                            break;
5942                        default:
5943                            alignment = Layout.Alignment.ALIGN_NORMAL;
5944                            break;
5945                    }
5946                    break;
5947                case TEXT_START:
5948                    alignment = Layout.Alignment.ALIGN_NORMAL;
5949                    break;
5950                case TEXT_END:
5951                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
5952                    break;
5953                case CENTER:
5954                    alignment = Layout.Alignment.ALIGN_CENTER;
5955                    break;
5956                case VIEW_START:
5957                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
5958                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
5959                    break;
5960                case VIEW_END:
5961                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
5962                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
5963                    break;
5964                default:
5965                    alignment = Layout.Alignment.ALIGN_NORMAL;
5966                    break;
5967            }
5968            mLayoutAlignment = alignment;
5969        }
5970        return mLayoutAlignment;
5971    }
5972
5973    /**
5974     * The width passed in is now the desired layout width,
5975     * not the full view width with padding.
5976     * {@hide}
5977     */
5978    protected void makeNewLayout(int w, int hintWidth,
5979                                 BoringLayout.Metrics boring,
5980                                 BoringLayout.Metrics hintBoring,
5981                                 int ellipsisWidth, boolean bringIntoView) {
5982        stopMarquee();
5983
5984        mHighlightPathBogus = true;
5985
5986        if (w < 0) {
5987            w = 0;
5988        }
5989        if (hintWidth < 0) {
5990            hintWidth = 0;
5991        }
5992
5993        Layout.Alignment alignment = getLayoutAlignment();
5994        boolean shouldEllipsize = mEllipsize != null && mInput == null;
5995
5996        if (mText instanceof Spannable) {
5997            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
5998                    alignment, mSpacingMult,
5999                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
6000                    ellipsisWidth);
6001        } else {
6002            if (boring == UNKNOWN_BORING) {
6003                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
6004                if (boring != null) {
6005                    mBoring = boring;
6006                }
6007            }
6008
6009            if (boring != null) {
6010                if (boring.width <= w &&
6011                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
6012                    if (mSavedLayout != null) {
6013                        mLayout = mSavedLayout.
6014                                replaceOrMake(mTransformed, mTextPaint,
6015                                w, alignment, mSpacingMult, mSpacingAdd,
6016                                boring, mIncludePad);
6017                    } else {
6018                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6019                                w, alignment, mSpacingMult, mSpacingAdd,
6020                                boring, mIncludePad);
6021                    }
6022
6023                    mSavedLayout = (BoringLayout) mLayout;
6024                } else if (shouldEllipsize && boring.width <= w) {
6025                    if (mSavedLayout != null) {
6026                        mLayout = mSavedLayout.
6027                                replaceOrMake(mTransformed, mTextPaint,
6028                                w, alignment, mSpacingMult, mSpacingAdd,
6029                                boring, mIncludePad, mEllipsize,
6030                                ellipsisWidth);
6031                    } else {
6032                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6033                                w, alignment, mSpacingMult, mSpacingAdd,
6034                                boring, mIncludePad, mEllipsize,
6035                                ellipsisWidth);
6036                    }
6037                } else if (shouldEllipsize) {
6038                    mLayout = new StaticLayout(mTransformed,
6039                                0, mTransformed.length(),
6040                                mTextPaint, w, alignment, mSpacingMult,
6041                                mSpacingAdd, mIncludePad, mEllipsize,
6042                                ellipsisWidth);
6043                } else {
6044                    mLayout = new StaticLayout(mTransformed, mTextPaint,
6045                            w, alignment, mSpacingMult, mSpacingAdd,
6046                            mIncludePad);
6047                }
6048            } else if (shouldEllipsize) {
6049                mLayout = new StaticLayout(mTransformed,
6050                            0, mTransformed.length(),
6051                            mTextPaint, w, alignment, mSpacingMult,
6052                            mSpacingAdd, mIncludePad, mEllipsize,
6053                            ellipsisWidth);
6054            } else {
6055                mLayout = new StaticLayout(mTransformed, mTextPaint,
6056                        w, alignment, mSpacingMult, mSpacingAdd,
6057                        mIncludePad);
6058            }
6059        }
6060
6061        shouldEllipsize = mEllipsize != null;
6062        mHintLayout = null;
6063
6064        if (mHint != null) {
6065            if (shouldEllipsize) hintWidth = w;
6066
6067            if (hintBoring == UNKNOWN_BORING) {
6068                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
6069                                                   mHintBoring);
6070                if (hintBoring != null) {
6071                    mHintBoring = hintBoring;
6072                }
6073            }
6074
6075            if (hintBoring != null) {
6076                if (hintBoring.width <= hintWidth &&
6077                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6078                    if (mSavedHintLayout != null) {
6079                        mHintLayout = mSavedHintLayout.
6080                                replaceOrMake(mHint, mTextPaint,
6081                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6082                                hintBoring, mIncludePad);
6083                    } else {
6084                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6085                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6086                                hintBoring, mIncludePad);
6087                    }
6088
6089                    mSavedHintLayout = (BoringLayout) mHintLayout;
6090                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6091                    if (mSavedHintLayout != null) {
6092                        mHintLayout = mSavedHintLayout.
6093                                replaceOrMake(mHint, mTextPaint,
6094                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6095                                hintBoring, mIncludePad, mEllipsize,
6096                                ellipsisWidth);
6097                    } else {
6098                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6099                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6100                                hintBoring, mIncludePad, mEllipsize,
6101                                ellipsisWidth);
6102                    }
6103                } else if (shouldEllipsize) {
6104                    mHintLayout = new StaticLayout(mHint,
6105                                0, mHint.length(),
6106                                mTextPaint, hintWidth, alignment, mSpacingMult,
6107                                mSpacingAdd, mIncludePad, mEllipsize,
6108                                ellipsisWidth);
6109                } else {
6110                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6111                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
6112                            mIncludePad);
6113                }
6114            } else if (shouldEllipsize) {
6115                mHintLayout = new StaticLayout(mHint,
6116                            0, mHint.length(),
6117                            mTextPaint, hintWidth, alignment, mSpacingMult,
6118                            mSpacingAdd, mIncludePad, mEllipsize,
6119                            ellipsisWidth);
6120            } else {
6121                mHintLayout = new StaticLayout(mHint, mTextPaint,
6122                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
6123                        mIncludePad);
6124            }
6125        }
6126
6127        if (bringIntoView) {
6128            registerForPreDraw();
6129        }
6130
6131        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6132            if (!compressText(ellipsisWidth)) {
6133                final int height = mLayoutParams.height;
6134                // If the size of the view does not depend on the size of the text, try to
6135                // start the marquee immediately
6136                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6137                    startMarquee();
6138                } else {
6139                    // Defer the start of the marquee until we know our width (see setFrame())
6140                    mRestartMarquee = true;
6141                }
6142            }
6143        }
6144
6145        // CursorControllers need a non-null mLayout
6146        prepareCursorControllers();
6147    }
6148
6149    private boolean compressText(float width) {
6150        if (isHardwareAccelerated()) return false;
6151
6152        // Only compress the text if it hasn't been compressed by the previous pass
6153        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6154                mTextPaint.getTextScaleX() == 1.0f) {
6155            final float textWidth = mLayout.getLineWidth(0);
6156            final float overflow = (textWidth + 1.0f - width) / width;
6157            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6158                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6159                post(new Runnable() {
6160                    public void run() {
6161                        requestLayout();
6162                    }
6163                });
6164                return true;
6165            }
6166        }
6167
6168        return false;
6169    }
6170
6171    private static int desired(Layout layout) {
6172        int n = layout.getLineCount();
6173        CharSequence text = layout.getText();
6174        float max = 0;
6175
6176        // if any line was wrapped, we can't use it.
6177        // but it's ok for the last line not to have a newline
6178
6179        for (int i = 0; i < n - 1; i++) {
6180            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6181                return -1;
6182        }
6183
6184        for (int i = 0; i < n; i++) {
6185            max = Math.max(max, layout.getLineWidth(i));
6186        }
6187
6188        return (int) FloatMath.ceil(max);
6189    }
6190
6191    /**
6192     * Set whether the TextView includes extra top and bottom padding to make
6193     * room for accents that go above the normal ascent and descent.
6194     * The default is true.
6195     *
6196     * @attr ref android.R.styleable#TextView_includeFontPadding
6197     */
6198    public void setIncludeFontPadding(boolean includepad) {
6199        mIncludePad = includepad;
6200
6201        if (mLayout != null) {
6202            nullLayouts();
6203            requestLayout();
6204            invalidate();
6205        }
6206    }
6207
6208    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6209
6210    @Override
6211    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6212        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6213        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6214        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6215        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6216
6217        int width;
6218        int height;
6219
6220        BoringLayout.Metrics boring = UNKNOWN_BORING;
6221        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6222
6223        int des = -1;
6224        boolean fromexisting = false;
6225
6226        if (widthMode == MeasureSpec.EXACTLY) {
6227            // Parent has told us how big to be. So be it.
6228            width = widthSize;
6229        } else {
6230            if (mLayout != null && mEllipsize == null) {
6231                des = desired(mLayout);
6232            }
6233
6234            if (des < 0) {
6235                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
6236                if (boring != null) {
6237                    mBoring = boring;
6238                }
6239            } else {
6240                fromexisting = true;
6241            }
6242
6243            if (boring == null || boring == UNKNOWN_BORING) {
6244                if (des < 0) {
6245                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6246                }
6247
6248                width = des;
6249            } else {
6250                width = boring.width;
6251            }
6252
6253            final Drawables dr = mDrawables;
6254            if (dr != null) {
6255                width = Math.max(width, dr.mDrawableWidthTop);
6256                width = Math.max(width, dr.mDrawableWidthBottom);
6257            }
6258
6259            if (mHint != null) {
6260                int hintDes = -1;
6261                int hintWidth;
6262
6263                if (mHintLayout != null && mEllipsize == null) {
6264                    hintDes = desired(mHintLayout);
6265                }
6266
6267                if (hintDes < 0) {
6268                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6269                    if (hintBoring != null) {
6270                        mHintBoring = hintBoring;
6271                    }
6272                }
6273
6274                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6275                    if (hintDes < 0) {
6276                        hintDes = (int) FloatMath.ceil(
6277                                Layout.getDesiredWidth(mHint, mTextPaint));
6278                    }
6279
6280                    hintWidth = hintDes;
6281                } else {
6282                    hintWidth = hintBoring.width;
6283                }
6284
6285                if (hintWidth > width) {
6286                    width = hintWidth;
6287                }
6288            }
6289
6290            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6291
6292            if (mMaxWidthMode == EMS) {
6293                width = Math.min(width, mMaxWidth * getLineHeight());
6294            } else {
6295                width = Math.min(width, mMaxWidth);
6296            }
6297
6298            if (mMinWidthMode == EMS) {
6299                width = Math.max(width, mMinWidth * getLineHeight());
6300            } else {
6301                width = Math.max(width, mMinWidth);
6302            }
6303
6304            // Check against our minimum width
6305            width = Math.max(width, getSuggestedMinimumWidth());
6306
6307            if (widthMode == MeasureSpec.AT_MOST) {
6308                width = Math.min(widthSize, width);
6309            }
6310        }
6311
6312        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6313        int unpaddedWidth = want;
6314
6315        if (mHorizontallyScrolling) want = VERY_WIDE;
6316
6317        int hintWant = want;
6318        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
6319
6320        if (mLayout == null) {
6321            makeNewLayout(want, hintWant, boring, hintBoring,
6322                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6323        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
6324                   (mLayout.getEllipsizedWidth() !=
6325                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6326            if (mHint == null && mEllipsize == null &&
6327                    want > mLayout.getWidth() &&
6328                    (mLayout instanceof BoringLayout ||
6329                            (fromexisting && des >= 0 && des <= want))) {
6330                mLayout.increaseWidthTo(want);
6331            } else {
6332                makeNewLayout(want, hintWant, boring, hintBoring,
6333                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6334            }
6335        } else {
6336            // Width has not changed.
6337        }
6338
6339        if (heightMode == MeasureSpec.EXACTLY) {
6340            // Parent has told us how big to be. So be it.
6341            height = heightSize;
6342            mDesiredHeightAtMeasure = -1;
6343        } else {
6344            int desired = getDesiredHeight();
6345
6346            height = desired;
6347            mDesiredHeightAtMeasure = desired;
6348
6349            if (heightMode == MeasureSpec.AT_MOST) {
6350                height = Math.min(desired, heightSize);
6351            }
6352        }
6353
6354        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6355        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6356            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6357        }
6358
6359        /*
6360         * We didn't let makeNewLayout() register to bring the cursor into view,
6361         * so do it here if there is any possibility that it is needed.
6362         */
6363        if (mMovement != null ||
6364            mLayout.getWidth() > unpaddedWidth ||
6365            mLayout.getHeight() > unpaddedHeight) {
6366            registerForPreDraw();
6367        } else {
6368            scrollTo(0, 0);
6369        }
6370
6371        setMeasuredDimension(width, height);
6372    }
6373
6374    private int getDesiredHeight() {
6375        return Math.max(
6376                getDesiredHeight(mLayout, true),
6377                getDesiredHeight(mHintLayout, mEllipsize != null));
6378    }
6379
6380    private int getDesiredHeight(Layout layout, boolean cap) {
6381        if (layout == null) {
6382            return 0;
6383        }
6384
6385        int linecount = layout.getLineCount();
6386        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6387        int desired = layout.getLineTop(linecount);
6388
6389        final Drawables dr = mDrawables;
6390        if (dr != null) {
6391            desired = Math.max(desired, dr.mDrawableHeightLeft);
6392            desired = Math.max(desired, dr.mDrawableHeightRight);
6393        }
6394
6395        desired += pad;
6396        layout.setMaximumVisibleLineCount(0);
6397
6398        if (mMaxMode == LINES) {
6399            /*
6400             * Don't cap the hint to a certain number of lines.
6401             * (Do cap it, though, if we have a maximum pixel height.)
6402             */
6403            if (cap) {
6404                if (linecount > mMaximum) {
6405                    layout.setMaximumVisibleLineCount(mMaximum);
6406                    desired = layout.getLineTop(mMaximum);
6407
6408                    if (dr != null) {
6409                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6410                        desired = Math.max(desired, dr.mDrawableHeightRight);
6411                    }
6412
6413                    desired += pad;
6414                    linecount = mMaximum;
6415                }
6416            }
6417        } else {
6418            desired = Math.min(desired, mMaximum);
6419        }
6420
6421        if (mMinMode == LINES) {
6422            if (linecount < mMinimum) {
6423                desired += getLineHeight() * (mMinimum - linecount);
6424            }
6425        } else {
6426            desired = Math.max(desired, mMinimum);
6427        }
6428
6429        // Check against our minimum height
6430        desired = Math.max(desired, getSuggestedMinimumHeight());
6431
6432        return desired;
6433    }
6434
6435    /**
6436     * Check whether a change to the existing text layout requires a
6437     * new view layout.
6438     */
6439    private void checkForResize() {
6440        boolean sizeChanged = false;
6441
6442        if (mLayout != null) {
6443            // Check if our width changed
6444            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6445                sizeChanged = true;
6446                invalidate();
6447            }
6448
6449            // Check if our height changed
6450            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6451                int desiredHeight = getDesiredHeight();
6452
6453                if (desiredHeight != this.getHeight()) {
6454                    sizeChanged = true;
6455                }
6456            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6457                if (mDesiredHeightAtMeasure >= 0) {
6458                    int desiredHeight = getDesiredHeight();
6459
6460                    if (desiredHeight != mDesiredHeightAtMeasure) {
6461                        sizeChanged = true;
6462                    }
6463                }
6464            }
6465        }
6466
6467        if (sizeChanged) {
6468            requestLayout();
6469            // caller will have already invalidated
6470        }
6471    }
6472
6473    /**
6474     * Check whether entirely new text requires a new view layout
6475     * or merely a new text layout.
6476     */
6477    private void checkForRelayout() {
6478        // If we have a fixed width, we can just swap in a new text layout
6479        // if the text height stays the same or if the view height is fixed.
6480
6481        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6482                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6483                (mHint == null || mHintLayout != null) &&
6484                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6485            // Static width, so try making a new text layout.
6486
6487            int oldht = mLayout.getHeight();
6488            int want = mLayout.getWidth();
6489            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6490
6491            /*
6492             * No need to bring the text into view, since the size is not
6493             * changing (unless we do the requestLayout(), in which case it
6494             * will happen at measure).
6495             */
6496            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6497                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6498                          false);
6499
6500            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6501                // In a fixed-height view, so use our new text layout.
6502                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6503                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6504                    invalidate();
6505                    return;
6506                }
6507
6508                // Dynamic height, but height has stayed the same,
6509                // so use our new text layout.
6510                if (mLayout.getHeight() == oldht &&
6511                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6512                    invalidate();
6513                    return;
6514                }
6515            }
6516
6517            // We lose: the height has changed and we have a dynamic height.
6518            // Request a new view layout using our new text layout.
6519            requestLayout();
6520            invalidate();
6521        } else {
6522            // Dynamic width, so we have no choice but to request a new
6523            // view layout with a new text layout.
6524
6525            nullLayouts();
6526            requestLayout();
6527            invalidate();
6528        }
6529    }
6530
6531    /**
6532     * Returns true if anything changed.
6533     */
6534    private boolean bringTextIntoView() {
6535        int line = 0;
6536        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6537            line = mLayout.getLineCount() - 1;
6538        }
6539
6540        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6541        int dir = mLayout.getParagraphDirection(line);
6542        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6543        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6544        int ht = mLayout.getHeight();
6545
6546        int scrollx, scrolly;
6547
6548        // Convert to left, center, or right alignment.
6549        if (a == Layout.Alignment.ALIGN_NORMAL) {
6550            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6551                Layout.Alignment.ALIGN_RIGHT;
6552        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6553            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6554                Layout.Alignment.ALIGN_LEFT;
6555        }
6556
6557        if (a == Layout.Alignment.ALIGN_CENTER) {
6558            /*
6559             * Keep centered if possible, or, if it is too wide to fit,
6560             * keep leading edge in view.
6561             */
6562
6563            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6564            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6565
6566            if (right - left < hspace) {
6567                scrollx = (right + left) / 2 - hspace / 2;
6568            } else {
6569                if (dir < 0) {
6570                    scrollx = right - hspace;
6571                } else {
6572                    scrollx = left;
6573                }
6574            }
6575        } else if (a == Layout.Alignment.ALIGN_LEFT) {
6576            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6577        } else { // a == Layout.Alignment.ALIGN_RIGHT
6578            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6579            scrollx = right - hspace;
6580        }
6581
6582        if (ht < vspace) {
6583            scrolly = 0;
6584        } else {
6585            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6586                scrolly = ht - vspace;
6587            } else {
6588                scrolly = 0;
6589            }
6590        }
6591
6592        if (scrollx != mScrollX || scrolly != mScrollY) {
6593            scrollTo(scrollx, scrolly);
6594            return true;
6595        } else {
6596            return false;
6597        }
6598    }
6599
6600    /**
6601     * Move the point, specified by the offset, into the view if it is needed.
6602     * This has to be called after layout. Returns true if anything changed.
6603     */
6604    public boolean bringPointIntoView(int offset) {
6605        boolean changed = false;
6606
6607        int line = mLayout.getLineForOffset(offset);
6608
6609        // FIXME: Is it okay to truncate this, or should we round?
6610        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6611        final int top = mLayout.getLineTop(line);
6612        final int bottom = mLayout.getLineTop(line + 1);
6613
6614        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6615        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6616        int ht = mLayout.getHeight();
6617
6618        int grav;
6619
6620        switch (mLayout.getParagraphAlignment(line)) {
6621            case ALIGN_LEFT:
6622                grav = 1;
6623                break;
6624            case ALIGN_RIGHT:
6625                grav = -1;
6626                break;
6627            case ALIGN_NORMAL:
6628                grav = mLayout.getParagraphDirection(line);
6629                break;
6630            case ALIGN_OPPOSITE:
6631                grav = -mLayout.getParagraphDirection(line);
6632                break;
6633            case ALIGN_CENTER:
6634            default:
6635                grav = 0;
6636                break;
6637        }
6638
6639        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6640        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6641
6642        int hslack = (bottom - top) / 2;
6643        int vslack = hslack;
6644
6645        if (vslack > vspace / 4)
6646            vslack = vspace / 4;
6647        if (hslack > hspace / 4)
6648            hslack = hspace / 4;
6649
6650        int hs = mScrollX;
6651        int vs = mScrollY;
6652
6653        if (top - vs < vslack)
6654            vs = top - vslack;
6655        if (bottom - vs > vspace - vslack)
6656            vs = bottom - (vspace - vslack);
6657        if (ht - vs < vspace)
6658            vs = ht - vspace;
6659        if (0 - vs > 0)
6660            vs = 0;
6661
6662        if (grav != 0) {
6663            if (x - hs < hslack) {
6664                hs = x - hslack;
6665            }
6666            if (x - hs > hspace - hslack) {
6667                hs = x - (hspace - hslack);
6668            }
6669        }
6670
6671        if (grav < 0) {
6672            if (left - hs > 0)
6673                hs = left;
6674            if (right - hs < hspace)
6675                hs = right - hspace;
6676        } else if (grav > 0) {
6677            if (right - hs < hspace)
6678                hs = right - hspace;
6679            if (left - hs > 0)
6680                hs = left;
6681        } else /* grav == 0 */ {
6682            if (right - left <= hspace) {
6683                /*
6684                 * If the entire text fits, center it exactly.
6685                 */
6686                hs = left - (hspace - (right - left)) / 2;
6687            } else if (x > right - hslack) {
6688                /*
6689                 * If we are near the right edge, keep the right edge
6690                 * at the edge of the view.
6691                 */
6692                hs = right - hspace;
6693            } else if (x < left + hslack) {
6694                /*
6695                 * If we are near the left edge, keep the left edge
6696                 * at the edge of the view.
6697                 */
6698                hs = left;
6699            } else if (left > hs) {
6700                /*
6701                 * Is there whitespace visible at the left?  Fix it if so.
6702                 */
6703                hs = left;
6704            } else if (right < hs + hspace) {
6705                /*
6706                 * Is there whitespace visible at the right?  Fix it if so.
6707                 */
6708                hs = right - hspace;
6709            } else {
6710                /*
6711                 * Otherwise, float as needed.
6712                 */
6713                if (x - hs < hslack) {
6714                    hs = x - hslack;
6715                }
6716                if (x - hs > hspace - hslack) {
6717                    hs = x - (hspace - hslack);
6718                }
6719            }
6720        }
6721
6722        if (hs != mScrollX || vs != mScrollY) {
6723            if (mScroller == null) {
6724                scrollTo(hs, vs);
6725            } else {
6726                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6727                int dx = hs - mScrollX;
6728                int dy = vs - mScrollY;
6729
6730                if (duration > ANIMATED_SCROLL_GAP) {
6731                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6732                    awakenScrollBars(mScroller.getDuration());
6733                    invalidate();
6734                } else {
6735                    if (!mScroller.isFinished()) {
6736                        mScroller.abortAnimation();
6737                    }
6738
6739                    scrollBy(dx, dy);
6740                }
6741
6742                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6743            }
6744
6745            changed = true;
6746        }
6747
6748        if (isFocused()) {
6749            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6750            // requestRectangleOnScreen() is in terms of content coordinates.
6751
6752            if (mTempRect == null) mTempRect = new Rect();
6753            mTempRect.set(x, top, x + 1, bottom);
6754            getInterestingRect(mTempRect, line);
6755            mTempRect.offset(mScrollX, mScrollY);
6756
6757            if (requestRectangleOnScreen(mTempRect)) {
6758                changed = true;
6759            }
6760        }
6761
6762        return changed;
6763    }
6764
6765    /**
6766     * Move the cursor, if needed, so that it is at an offset that is visible
6767     * to the user.  This will not move the cursor if it represents more than
6768     * one character (a selection range).  This will only work if the
6769     * TextView contains spannable text; otherwise it will do nothing.
6770     *
6771     * @return True if the cursor was actually moved, false otherwise.
6772     */
6773    public boolean moveCursorToVisibleOffset() {
6774        if (!(mText instanceof Spannable)) {
6775            return false;
6776        }
6777        int start = getSelectionStart();
6778        int end = getSelectionEnd();
6779        if (start != end) {
6780            return false;
6781        }
6782
6783        // First: make sure the line is visible on screen:
6784
6785        int line = mLayout.getLineForOffset(start);
6786
6787        final int top = mLayout.getLineTop(line);
6788        final int bottom = mLayout.getLineTop(line + 1);
6789        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6790        int vslack = (bottom - top) / 2;
6791        if (vslack > vspace / 4)
6792            vslack = vspace / 4;
6793        final int vs = mScrollY;
6794
6795        if (top < (vs+vslack)) {
6796            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6797        } else if (bottom > (vspace+vs-vslack)) {
6798            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6799        }
6800
6801        // Next: make sure the character is visible on screen:
6802
6803        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6804        final int hs = mScrollX;
6805        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6806        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6807
6808        // line might contain bidirectional text
6809        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6810        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6811
6812        int newStart = start;
6813        if (newStart < lowChar) {
6814            newStart = lowChar;
6815        } else if (newStart > highChar) {
6816            newStart = highChar;
6817        }
6818
6819        if (newStart != start) {
6820            Selection.setSelection((Spannable)mText, newStart);
6821            return true;
6822        }
6823
6824        return false;
6825    }
6826
6827    @Override
6828    public void computeScroll() {
6829        if (mScroller != null) {
6830            if (mScroller.computeScrollOffset()) {
6831                mScrollX = mScroller.getCurrX();
6832                mScrollY = mScroller.getCurrY();
6833                invalidateParentCaches();
6834                postInvalidate();  // So we draw again
6835            }
6836        }
6837    }
6838
6839    private void getInterestingRect(Rect r, int line) {
6840        convertFromViewportToContentCoordinates(r);
6841
6842        // Rectangle can can be expanded on first and last line to take
6843        // padding into account.
6844        // TODO Take left/right padding into account too?
6845        if (line == 0) r.top -= getExtendedPaddingTop();
6846        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6847    }
6848
6849    private void convertFromViewportToContentCoordinates(Rect r) {
6850        final int horizontalOffset = viewportToContentHorizontalOffset();
6851        r.left += horizontalOffset;
6852        r.right += horizontalOffset;
6853
6854        final int verticalOffset = viewportToContentVerticalOffset();
6855        r.top += verticalOffset;
6856        r.bottom += verticalOffset;
6857    }
6858
6859    private int viewportToContentHorizontalOffset() {
6860        return getCompoundPaddingLeft() - mScrollX;
6861    }
6862
6863    private int viewportToContentVerticalOffset() {
6864        int offset = getExtendedPaddingTop() - mScrollY;
6865        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6866            offset += getVerticalOffset(false);
6867        }
6868        return offset;
6869    }
6870
6871    @Override
6872    public void debug(int depth) {
6873        super.debug(depth);
6874
6875        String output = debugIndent(depth);
6876        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6877                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6878                + "} ";
6879
6880        if (mText != null) {
6881
6882            output += "mText=\"" + mText + "\" ";
6883            if (mLayout != null) {
6884                output += "mLayout width=" + mLayout.getWidth()
6885                        + " height=" + mLayout.getHeight();
6886            }
6887        } else {
6888            output += "mText=NULL";
6889        }
6890        Log.d(VIEW_LOG_TAG, output);
6891    }
6892
6893    /**
6894     * Convenience for {@link Selection#getSelectionStart}.
6895     */
6896    @ViewDebug.ExportedProperty(category = "text")
6897    public int getSelectionStart() {
6898        return Selection.getSelectionStart(getText());
6899    }
6900
6901    /**
6902     * Convenience for {@link Selection#getSelectionEnd}.
6903     */
6904    @ViewDebug.ExportedProperty(category = "text")
6905    public int getSelectionEnd() {
6906        return Selection.getSelectionEnd(getText());
6907    }
6908
6909    /**
6910     * Return true iff there is a selection inside this text view.
6911     */
6912    public boolean hasSelection() {
6913        final int selectionStart = getSelectionStart();
6914        final int selectionEnd = getSelectionEnd();
6915
6916        return selectionStart >= 0 && selectionStart != selectionEnd;
6917    }
6918
6919    /**
6920     * Sets the properties of this field (lines, horizontally scrolling,
6921     * transformation method) to be for a single-line input.
6922     *
6923     * @attr ref android.R.styleable#TextView_singleLine
6924     */
6925    public void setSingleLine() {
6926        setSingleLine(true);
6927    }
6928
6929    /**
6930     * Sets the properties of this field to transform input to ALL CAPS
6931     * display. This may use a "small caps" formatting if available.
6932     * This setting will be ignored if this field is editable or selectable.
6933     *
6934     * This call replaces the current transformation method. Disabling this
6935     * will not necessarily restore the previous behavior from before this
6936     * was enabled.
6937     *
6938     * @see #setTransformationMethod(TransformationMethod)
6939     * @attr ref android.R.styleable#TextView_textAllCaps
6940     */
6941    public void setAllCaps(boolean allCaps) {
6942        if (allCaps) {
6943            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
6944        } else {
6945            setTransformationMethod(null);
6946        }
6947    }
6948
6949    /**
6950     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6951     * transformation method) to be for a single-line input; if false, restores these to the default
6952     * conditions.
6953     *
6954     * Note that the default conditions are not necessarily those that were in effect prior this
6955     * method, and you may want to reset these properties to your custom values.
6956     *
6957     * @attr ref android.R.styleable#TextView_singleLine
6958     */
6959    @android.view.RemotableViewMethod
6960    public void setSingleLine(boolean singleLine) {
6961        // Could be used, but may break backward compatibility.
6962        // if (mSingleLine == singleLine) return;
6963        setInputTypeSingleLine(singleLine);
6964        applySingleLine(singleLine, true, true);
6965    }
6966
6967    /**
6968     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6969     * @param singleLine
6970     */
6971    private void setInputTypeSingleLine(boolean singleLine) {
6972        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6973            if (singleLine) {
6974                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6975            } else {
6976                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6977            }
6978        }
6979    }
6980
6981    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6982            boolean changeMaxLines) {
6983        mSingleLine = singleLine;
6984        if (singleLine) {
6985            setLines(1);
6986            setHorizontallyScrolling(true);
6987            if (applyTransformation) {
6988                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6989            }
6990        } else {
6991            if (changeMaxLines) {
6992                setMaxLines(Integer.MAX_VALUE);
6993            }
6994            setHorizontallyScrolling(false);
6995            if (applyTransformation) {
6996                setTransformationMethod(null);
6997            }
6998        }
6999    }
7000
7001    /**
7002     * Causes words in the text that are longer than the view is wide
7003     * to be ellipsized instead of broken in the middle.  You may also
7004     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7005     * to constrain the text to a single line.  Use <code>null</code>
7006     * to turn off ellipsizing.
7007     *
7008     * @attr ref android.R.styleable#TextView_ellipsize
7009     */
7010    public void setEllipsize(TextUtils.TruncateAt where) {
7011        mEllipsize = where;
7012
7013        if (mLayout != null) {
7014            nullLayouts();
7015            requestLayout();
7016            invalidate();
7017        }
7018    }
7019
7020    /**
7021     * Sets how many times to repeat the marquee animation. Only applied if the
7022     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7023     *
7024     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7025     */
7026    public void setMarqueeRepeatLimit(int marqueeLimit) {
7027        mMarqueeRepeatLimit = marqueeLimit;
7028    }
7029
7030    /**
7031     * Returns where, if anywhere, words that are longer than the view
7032     * is wide should be ellipsized.
7033     */
7034    @ViewDebug.ExportedProperty
7035    public TextUtils.TruncateAt getEllipsize() {
7036        return mEllipsize;
7037    }
7038
7039    /**
7040     * Set the TextView so that when it takes focus, all the text is
7041     * selected.
7042     *
7043     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7044     */
7045    @android.view.RemotableViewMethod
7046    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7047        mSelectAllOnFocus = selectAllOnFocus;
7048
7049        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7050            setText(mText, BufferType.SPANNABLE);
7051        }
7052    }
7053
7054    /**
7055     * Set whether the cursor is visible.  The default is true.
7056     *
7057     * @attr ref android.R.styleable#TextView_cursorVisible
7058     */
7059    @android.view.RemotableViewMethod
7060    public void setCursorVisible(boolean visible) {
7061        if (mCursorVisible != visible) {
7062            mCursorVisible = visible;
7063            invalidate();
7064
7065            makeBlink();
7066
7067            // InsertionPointCursorController depends on mCursorVisible
7068            prepareCursorControllers();
7069        }
7070    }
7071
7072    private boolean isCursorVisible() {
7073        return mCursorVisible && isTextEditable();
7074    }
7075
7076    private boolean canMarquee() {
7077        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7078        return width > 0 && mLayout.getLineWidth(0) > width;
7079    }
7080
7081    private void startMarquee() {
7082        // Do not ellipsize EditText
7083        if (mInput != null) return;
7084
7085        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7086            return;
7087        }
7088
7089        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7090                getLineCount() == 1 && canMarquee()) {
7091
7092            if (mMarquee == null) mMarquee = new Marquee(this);
7093            mMarquee.start(mMarqueeRepeatLimit);
7094        }
7095    }
7096
7097    private void stopMarquee() {
7098        if (mMarquee != null && !mMarquee.isStopped()) {
7099            mMarquee.stop();
7100        }
7101    }
7102
7103    private void startStopMarquee(boolean start) {
7104        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7105            if (start) {
7106                startMarquee();
7107            } else {
7108                stopMarquee();
7109            }
7110        }
7111    }
7112
7113    private static final class Marquee extends Handler {
7114        // TODO: Add an option to configure this
7115        private static final float MARQUEE_DELTA_MAX = 0.07f;
7116        private static final int MARQUEE_DELAY = 1200;
7117        private static final int MARQUEE_RESTART_DELAY = 1200;
7118        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7119        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7120
7121        private static final byte MARQUEE_STOPPED = 0x0;
7122        private static final byte MARQUEE_STARTING = 0x1;
7123        private static final byte MARQUEE_RUNNING = 0x2;
7124
7125        private static final int MESSAGE_START = 0x1;
7126        private static final int MESSAGE_TICK = 0x2;
7127        private static final int MESSAGE_RESTART = 0x3;
7128
7129        private final WeakReference<TextView> mView;
7130
7131        private byte mStatus = MARQUEE_STOPPED;
7132        private final float mScrollUnit;
7133        private float mMaxScroll;
7134        float mMaxFadeScroll;
7135        private float mGhostStart;
7136        private float mGhostOffset;
7137        private float mFadeStop;
7138        private int mRepeatLimit;
7139
7140        float mScroll;
7141
7142        Marquee(TextView v) {
7143            final float density = v.getContext().getResources().getDisplayMetrics().density;
7144            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7145            mView = new WeakReference<TextView>(v);
7146        }
7147
7148        @Override
7149        public void handleMessage(Message msg) {
7150            switch (msg.what) {
7151                case MESSAGE_START:
7152                    mStatus = MARQUEE_RUNNING;
7153                    tick();
7154                    break;
7155                case MESSAGE_TICK:
7156                    tick();
7157                    break;
7158                case MESSAGE_RESTART:
7159                    if (mStatus == MARQUEE_RUNNING) {
7160                        if (mRepeatLimit >= 0) {
7161                            mRepeatLimit--;
7162                        }
7163                        start(mRepeatLimit);
7164                    }
7165                    break;
7166            }
7167        }
7168
7169        void tick() {
7170            if (mStatus != MARQUEE_RUNNING) {
7171                return;
7172            }
7173
7174            removeMessages(MESSAGE_TICK);
7175
7176            final TextView textView = mView.get();
7177            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7178                mScroll += mScrollUnit;
7179                if (mScroll > mMaxScroll) {
7180                    mScroll = mMaxScroll;
7181                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7182                } else {
7183                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7184                }
7185                textView.invalidate();
7186            }
7187        }
7188
7189        void stop() {
7190            mStatus = MARQUEE_STOPPED;
7191            removeMessages(MESSAGE_START);
7192            removeMessages(MESSAGE_RESTART);
7193            removeMessages(MESSAGE_TICK);
7194            resetScroll();
7195        }
7196
7197        private void resetScroll() {
7198            mScroll = 0.0f;
7199            final TextView textView = mView.get();
7200            if (textView != null) textView.invalidate();
7201        }
7202
7203        void start(int repeatLimit) {
7204            if (repeatLimit == 0) {
7205                stop();
7206                return;
7207            }
7208            mRepeatLimit = repeatLimit;
7209            final TextView textView = mView.get();
7210            if (textView != null && textView.mLayout != null) {
7211                mStatus = MARQUEE_STARTING;
7212                mScroll = 0.0f;
7213                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7214                        textView.getCompoundPaddingRight();
7215                final float lineWidth = textView.mLayout.getLineWidth(0);
7216                final float gap = textWidth / 3.0f;
7217                mGhostStart = lineWidth - textWidth + gap;
7218                mMaxScroll = mGhostStart + textWidth;
7219                mGhostOffset = lineWidth + gap;
7220                mFadeStop = lineWidth + textWidth / 6.0f;
7221                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7222
7223                textView.invalidate();
7224                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7225            }
7226        }
7227
7228        float getGhostOffset() {
7229            return mGhostOffset;
7230        }
7231
7232        boolean shouldDrawLeftFade() {
7233            return mScroll <= mFadeStop;
7234        }
7235
7236        boolean shouldDrawGhost() {
7237            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7238        }
7239
7240        boolean isRunning() {
7241            return mStatus == MARQUEE_RUNNING;
7242        }
7243
7244        boolean isStopped() {
7245            return mStatus == MARQUEE_STOPPED;
7246        }
7247    }
7248
7249    /**
7250     * This method is called when the text is changed, in case any subclasses
7251     * would like to know.
7252     *
7253     * Within <code>text</code>, the <code>lengthAfter</code> characters
7254     * beginning at <code>start</code> have just replaced old text that had
7255     * length <code>lengthBefore</code>. It is an error to attempt to make
7256     * changes to <code>text</code> from this callback.
7257     *
7258     * @param text The text the TextView is displaying
7259     * @param start The offset of the start of the range of the text that was
7260     * modified
7261     * @param lengthBefore The length of the former text that has been replaced
7262     * @param lengthAfter The length of the replacement modified text
7263     */
7264    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7265        // intentionally empty
7266    }
7267
7268    /**
7269     * This method is called when the selection has changed, in case any
7270     * subclasses would like to know.
7271     *
7272     * @param selStart The new selection start location.
7273     * @param selEnd The new selection end location.
7274     */
7275    protected void onSelectionChanged(int selStart, int selEnd) {
7276        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7277    }
7278
7279    /**
7280     * Adds a TextWatcher to the list of those whose methods are called
7281     * whenever this TextView's text changes.
7282     * <p>
7283     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7284     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7285     * if there are any text changed listeners forces the buffer type to
7286     * Editable if it would not otherwise be and does call this method.
7287     */
7288    public void addTextChangedListener(TextWatcher watcher) {
7289        if (mListeners == null) {
7290            mListeners = new ArrayList<TextWatcher>();
7291        }
7292
7293        mListeners.add(watcher);
7294    }
7295
7296    /**
7297     * Removes the specified TextWatcher from the list of those whose
7298     * methods are called
7299     * whenever this TextView's text changes.
7300     */
7301    public void removeTextChangedListener(TextWatcher watcher) {
7302        if (mListeners != null) {
7303            int i = mListeners.indexOf(watcher);
7304
7305            if (i >= 0) {
7306                mListeners.remove(i);
7307            }
7308        }
7309    }
7310
7311    private void sendBeforeTextChanged(CharSequence text, int start, int before,
7312                                   int after) {
7313        if (mListeners != null) {
7314            final ArrayList<TextWatcher> list = mListeners;
7315            final int count = list.size();
7316            for (int i = 0; i < count; i++) {
7317                list.get(i).beforeTextChanged(text, start, before, after);
7318            }
7319        }
7320    }
7321
7322    /**
7323     * Not private so it can be called from an inner class without going
7324     * through a thunk.
7325     */
7326    void sendOnTextChanged(CharSequence text, int start, int before,
7327                                   int after) {
7328        if (mListeners != null) {
7329            final ArrayList<TextWatcher> list = mListeners;
7330            final int count = list.size();
7331            for (int i = 0; i < count; i++) {
7332                list.get(i).onTextChanged(text, start, before, after);
7333            }
7334        }
7335    }
7336
7337    /**
7338     * Not private so it can be called from an inner class without going
7339     * through a thunk.
7340     */
7341    void sendAfterTextChanged(Editable text) {
7342        if (mListeners != null) {
7343            final ArrayList<TextWatcher> list = mListeners;
7344            final int count = list.size();
7345            for (int i = 0; i < count; i++) {
7346                list.get(i).afterTextChanged(text);
7347            }
7348        }
7349    }
7350
7351    /**
7352     * Not private so it can be called from an inner class without going
7353     * through a thunk.
7354     */
7355    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7356        final InputMethodState ims = mInputMethodState;
7357        if (ims == null || ims.mBatchEditNesting == 0) {
7358            updateAfterEdit();
7359        }
7360        if (ims != null) {
7361            ims.mContentChanged = true;
7362            if (ims.mChangedStart < 0) {
7363                ims.mChangedStart = start;
7364                ims.mChangedEnd = start+before;
7365            } else {
7366                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7367                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7368            }
7369            ims.mChangedDelta += after-before;
7370        }
7371
7372        sendOnTextChanged(buffer, start, before, after);
7373        onTextChanged(buffer, start, before, after);
7374
7375        // Hide the controllers if the amount of content changed
7376        if (before != after) {
7377            hideControllers();
7378        }
7379    }
7380
7381    /**
7382     * Not private so it can be called from an inner class without going
7383     * through a thunk.
7384     */
7385    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7386        // XXX Make the start and end move together if this ends up
7387        // spending too much time invalidating.
7388
7389        boolean selChanged = false;
7390        int newSelStart=-1, newSelEnd=-1;
7391
7392        final InputMethodState ims = mInputMethodState;
7393
7394        if (what == Selection.SELECTION_END) {
7395            mHighlightPathBogus = true;
7396            selChanged = true;
7397            newSelEnd = newStart;
7398
7399            if (!isFocused()) {
7400                mSelectionMoved = true;
7401            }
7402
7403            if (oldStart >= 0 || newStart >= 0) {
7404                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7405                registerForPreDraw();
7406                makeBlink();
7407            }
7408        }
7409
7410        if (what == Selection.SELECTION_START) {
7411            mHighlightPathBogus = true;
7412            selChanged = true;
7413            newSelStart = newStart;
7414
7415            if (!isFocused()) {
7416                mSelectionMoved = true;
7417            }
7418
7419            if (oldStart >= 0 || newStart >= 0) {
7420                int end = Selection.getSelectionEnd(buf);
7421                invalidateCursor(end, oldStart, newStart);
7422            }
7423        }
7424
7425        if (selChanged) {
7426            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7427                if (newSelStart < 0) {
7428                    newSelStart = Selection.getSelectionStart(buf);
7429                }
7430                if (newSelEnd < 0) {
7431                    newSelEnd = Selection.getSelectionEnd(buf);
7432                }
7433                onSelectionChanged(newSelStart, newSelEnd);
7434            }
7435        }
7436
7437        if (what instanceof UpdateAppearance ||
7438            what instanceof ParagraphStyle) {
7439            if (ims == null || ims.mBatchEditNesting == 0) {
7440                invalidate();
7441                mHighlightPathBogus = true;
7442                checkForResize();
7443            } else {
7444                ims.mContentChanged = true;
7445            }
7446        }
7447
7448        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7449            mHighlightPathBogus = true;
7450            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7451                ims.mSelectionModeChanged = true;
7452            }
7453
7454            if (Selection.getSelectionStart(buf) >= 0) {
7455                if (ims == null || ims.mBatchEditNesting == 0) {
7456                    invalidateCursor();
7457                } else {
7458                    ims.mCursorChanged = true;
7459                }
7460            }
7461        }
7462
7463        if (what instanceof ParcelableSpan) {
7464            // If this is a span that can be sent to a remote process,
7465            // the current extract editor would be interested in it.
7466            if (ims != null && ims.mExtracting != null) {
7467                if (ims.mBatchEditNesting != 0) {
7468                    if (oldStart >= 0) {
7469                        if (ims.mChangedStart > oldStart) {
7470                            ims.mChangedStart = oldStart;
7471                        }
7472                        if (ims.mChangedStart > oldEnd) {
7473                            ims.mChangedStart = oldEnd;
7474                        }
7475                    }
7476                    if (newStart >= 0) {
7477                        if (ims.mChangedStart > newStart) {
7478                            ims.mChangedStart = newStart;
7479                        }
7480                        if (ims.mChangedStart > newEnd) {
7481                            ims.mChangedStart = newEnd;
7482                        }
7483                    }
7484                } else {
7485                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7486                            + oldStart + "-" + oldEnd + ","
7487                            + newStart + "-" + newEnd + what);
7488                    ims.mContentChanged = true;
7489                }
7490            }
7491        }
7492    }
7493
7494    private class ChangeWatcher
7495    implements TextWatcher, SpanWatcher {
7496
7497        private CharSequence mBeforeText;
7498
7499        public void beforeTextChanged(CharSequence buffer, int start,
7500                                      int before, int after) {
7501            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
7502                    + " before=" + before + " after=" + after + ": " + buffer);
7503
7504            if (AccessibilityManager.getInstance(mContext).isEnabled()
7505                    && !isPasswordInputType(mInputType)
7506                    && !hasPasswordTransformationMethod()) {
7507                mBeforeText = buffer.toString();
7508            }
7509
7510            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
7511        }
7512
7513        public void onTextChanged(CharSequence buffer, int start,
7514                                  int before, int after) {
7515            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
7516                    + " before=" + before + " after=" + after + ": " + buffer);
7517            TextView.this.handleTextChanged(buffer, start, before, after);
7518
7519            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
7520                    (isFocused() || isSelected() &&
7521                    isShown())) {
7522                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
7523                mBeforeText = null;
7524            }
7525        }
7526
7527        public void afterTextChanged(Editable buffer) {
7528            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
7529            TextView.this.sendAfterTextChanged(buffer);
7530
7531            if (MetaKeyKeyListener.getMetaState(buffer,
7532                                 MetaKeyKeyListener.META_SELECTING) != 0) {
7533                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
7534            }
7535        }
7536
7537        public void onSpanChanged(Spannable buf,
7538                                  Object what, int s, int e, int st, int en) {
7539            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
7540                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
7541            TextView.this.spanChange(buf, what, s, st, e, en);
7542        }
7543
7544        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7545            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7546                    + " what=" + what + ": " + buf);
7547            TextView.this.spanChange(buf, what, -1, s, -1, e);
7548        }
7549
7550        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7551            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7552                    + " what=" + what + ": " + buf);
7553            TextView.this.spanChange(buf, what, s, -1, e, -1);
7554        }
7555    }
7556
7557    /**
7558     * @hide
7559     */
7560    @Override
7561    public void dispatchFinishTemporaryDetach() {
7562        mDispatchTemporaryDetach = true;
7563        super.dispatchFinishTemporaryDetach();
7564        mDispatchTemporaryDetach = false;
7565    }
7566
7567    @Override
7568    public void onStartTemporaryDetach() {
7569        super.onStartTemporaryDetach();
7570        // Only track when onStartTemporaryDetach() is called directly,
7571        // usually because this instance is an editable field in a list
7572        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7573
7574        // Because of View recycling in ListView, there is no easy way to know when a TextView with
7575        // selection becomes visible again. Until a better solution is found, stop text selection
7576        // mode (if any) as soon as this TextView is recycled.
7577        stopSelectionActionMode();
7578    }
7579
7580    @Override
7581    public void onFinishTemporaryDetach() {
7582        super.onFinishTemporaryDetach();
7583        // Only track when onStartTemporaryDetach() is called directly,
7584        // usually because this instance is an editable field in a list
7585        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7586    }
7587
7588    @Override
7589    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7590        if (mTemporaryDetach) {
7591            // If we are temporarily in the detach state, then do nothing.
7592            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7593            return;
7594        }
7595
7596        mShowCursor = SystemClock.uptimeMillis();
7597
7598        ensureEndedBatchEdit();
7599
7600        if (focused) {
7601            int selStart = getSelectionStart();
7602            int selEnd = getSelectionEnd();
7603
7604            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7605            // mode for these, unless there was a specific selection already started.
7606            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7607                    selEnd == mText.length();
7608            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7609
7610            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7611                // If a tap was used to give focus to that view, move cursor at tap position.
7612                // Has to be done before onTakeFocus, which can be overloaded.
7613                final int lastTapPosition = getLastTapPosition();
7614                if (lastTapPosition >= 0) {
7615                    Selection.setSelection((Spannable) mText, lastTapPosition);
7616                }
7617
7618                if (mMovement != null) {
7619                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7620                }
7621
7622                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7623                // pressed. Since it is the ViewAncestor's mView, it requests focus before
7624                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7625                // This special case ensure that we keep current selection in that case.
7626                // It would be better to know why the DecorView does not have focus at that time.
7627                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7628                        selStart >= 0 && selEnd >= 0) {
7629                    /*
7630                     * Someone intentionally set the selection, so let them
7631                     * do whatever it is that they wanted to do instead of
7632                     * the default on-focus behavior.  We reset the selection
7633                     * here instead of just skipping the onTakeFocus() call
7634                     * because some movement methods do something other than
7635                     * just setting the selection in theirs and we still
7636                     * need to go through that path.
7637                     */
7638                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7639                }
7640
7641                if (mSelectAllOnFocus) {
7642                    selectAll();
7643                }
7644
7645                mTouchFocusSelected = true;
7646            }
7647
7648            mFrozenWithFocus = false;
7649            mSelectionMoved = false;
7650
7651            if (mText instanceof Spannable) {
7652                Spannable sp = (Spannable) mText;
7653                MetaKeyKeyListener.resetMetaState(sp);
7654            }
7655
7656            makeBlink();
7657
7658            if (mError != null) {
7659                showError();
7660            }
7661        } else {
7662            if (mError != null) {
7663                hideError();
7664            }
7665            // Don't leave us in the middle of a batch edit.
7666            onEndBatchEdit();
7667
7668            if (this instanceof ExtractEditText) {
7669                // terminateTextSelectionMode removes selection, which we want to keep when
7670                // ExtractEditText goes out of focus.
7671                final int selStart = getSelectionStart();
7672                final int selEnd = getSelectionEnd();
7673                hideControllers();
7674                Selection.setSelection((Spannable) mText, selStart, selEnd);
7675            } else {
7676                hideControllers();
7677            }
7678
7679            // No need to create the controller
7680            if (mSelectionModifierCursorController != null) {
7681                mSelectionModifierCursorController.resetTouchOffsets();
7682            }
7683        }
7684
7685        startStopMarquee(focused);
7686
7687        if (mTransformation != null) {
7688            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7689        }
7690
7691        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7692    }
7693
7694    private int getLastTapPosition() {
7695        // No need to create the controller at that point, no last tap position saved
7696        if (mSelectionModifierCursorController != null) {
7697            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7698            if (lastTapPosition >= 0) {
7699                // Safety check, should not be possible.
7700                if (lastTapPosition > mText.length()) {
7701                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7702                            + mText.length() + ")");
7703                    lastTapPosition = mText.length();
7704                }
7705                return lastTapPosition;
7706            }
7707        }
7708
7709        return -1;
7710    }
7711
7712    @Override
7713    public void onWindowFocusChanged(boolean hasWindowFocus) {
7714        super.onWindowFocusChanged(hasWindowFocus);
7715
7716        if (hasWindowFocus) {
7717            if (mBlink != null) {
7718                mBlink.uncancel();
7719                makeBlink();
7720            }
7721        } else {
7722            if (mBlink != null) {
7723                mBlink.cancel();
7724            }
7725            // Don't leave us in the middle of a batch edit.
7726            onEndBatchEdit();
7727            if (mInputContentType != null) {
7728                mInputContentType.enterDown = false;
7729            }
7730            hideControllers();
7731            removeAllSuggestionSpans();
7732        }
7733
7734        startStopMarquee(hasWindowFocus);
7735    }
7736
7737    private void removeAllSuggestionSpans() {
7738        if (mText instanceof Editable) {
7739            Editable editable = ((Editable) mText);
7740            SuggestionSpan[] spans = editable.getSpans(0, mText.length(), SuggestionSpan.class);
7741            final int length = spans.length;
7742            for (int i = 0; i < length; i++) {
7743                editable.removeSpan(spans[i]);
7744            }
7745        }
7746    }
7747
7748    @Override
7749    protected void onVisibilityChanged(View changedView, int visibility) {
7750        super.onVisibilityChanged(changedView, visibility);
7751        if (visibility != VISIBLE) {
7752            hideControllers();
7753        }
7754    }
7755
7756    /**
7757     * Use {@link BaseInputConnection#removeComposingSpans
7758     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7759     * state from this text view.
7760     */
7761    public void clearComposingText() {
7762        if (mText instanceof Spannable) {
7763            BaseInputConnection.removeComposingSpans((Spannable)mText);
7764        }
7765    }
7766
7767    @Override
7768    public void setSelected(boolean selected) {
7769        boolean wasSelected = isSelected();
7770
7771        super.setSelected(selected);
7772
7773        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7774            if (selected) {
7775                startMarquee();
7776            } else {
7777                stopMarquee();
7778            }
7779        }
7780    }
7781
7782    @Override
7783    public boolean onTouchEvent(MotionEvent event) {
7784        final int action = event.getActionMasked();
7785
7786        if (hasSelectionController()) {
7787            getSelectionController().onTouchEvent(event);
7788        }
7789
7790        if (action == MotionEvent.ACTION_DOWN) {
7791            mLastDownPositionX = event.getX();
7792            mLastDownPositionY = event.getY();
7793
7794            // Reset this state; it will be re-set if super.onTouchEvent
7795            // causes focus to move to the view.
7796            mTouchFocusSelected = false;
7797            mIgnoreActionUpEvent = false;
7798        }
7799
7800        final boolean superResult = super.onTouchEvent(event);
7801
7802        /*
7803         * Don't handle the release after a long press, because it will
7804         * move the selection away from whatever the menu action was
7805         * trying to affect.
7806         */
7807        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7808            mDiscardNextActionUp = false;
7809            return superResult;
7810        }
7811
7812        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7813                isFocused();
7814
7815        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7816                && mText instanceof Spannable && mLayout != null) {
7817            boolean handled = false;
7818
7819            if (mMovement != null) {
7820                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7821            }
7822
7823            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7824                // The LinkMovementMethod which should handle taps on links has not been installed
7825                // to support text selection. We reproduce its behavior here to open links.
7826                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7827                        getSelectionEnd(), ClickableSpan.class);
7828
7829                if (links.length != 0) {
7830                    links[0].onClick(this);
7831                    handled = true;
7832                }
7833            }
7834
7835            if ((isTextEditable() || mTextIsSelectable) && touchIsFinished) {
7836                // Show the IME, except when selecting in read-only text.
7837                final InputMethodManager imm = InputMethodManager.peekInstance();
7838                if (imm != null) {
7839                    imm.viewClicked(this);
7840                }
7841                if (!mTextIsSelectable) {
7842                    handled |= imm != null && imm.showSoftInput(this, 0);
7843                }
7844
7845                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
7846                if (!selectAllGotFocus && hasSelection()) {
7847                    startSelectionActionMode();
7848                } else {
7849                    stopSelectionActionMode();
7850                    hideSuggestions();
7851                    if (hasInsertionController() && !selectAllGotFocus && mText.length() > 0) {
7852                        getInsertionController().show();
7853                    }
7854                }
7855            }
7856
7857            if (handled) {
7858                return true;
7859            }
7860        }
7861
7862        return superResult;
7863    }
7864
7865    @Override
7866    public boolean onGenericMotionEvent(MotionEvent event) {
7867        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7868            try {
7869                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
7870                    return true;
7871                }
7872            } catch (AbstractMethodError ex) {
7873                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
7874                // Ignore its absence in case third party applications implemented the
7875                // interface directly.
7876            }
7877        }
7878        return super.onGenericMotionEvent(event);
7879    }
7880
7881    private void prepareCursorControllers() {
7882        boolean windowSupportsHandles = false;
7883
7884        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7885        if (params instanceof WindowManager.LayoutParams) {
7886            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7887            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7888                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7889        }
7890
7891        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7892        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7893                mLayout != null;
7894
7895        if (!mInsertionControllerEnabled) {
7896            hideInsertionPointCursorController();
7897            if (mInsertionPointCursorController != null) {
7898                mInsertionPointCursorController.onDetached();
7899                mInsertionPointCursorController = null;
7900            }
7901        }
7902
7903        if (!mSelectionControllerEnabled) {
7904            stopSelectionActionMode();
7905            if (mSelectionModifierCursorController != null) {
7906                mSelectionModifierCursorController.onDetached();
7907                mSelectionModifierCursorController = null;
7908            }
7909        }
7910    }
7911
7912    /**
7913     * @return True iff this TextView contains a text that can be edited, or if this is
7914     * a selectable TextView.
7915     */
7916    private boolean isTextEditable() {
7917        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7918    }
7919
7920    /**
7921     * Returns true, only while processing a touch gesture, if the initial
7922     * touch down event caused focus to move to the text view and as a result
7923     * its selection changed.  Only valid while processing the touch gesture
7924     * of interest.
7925     */
7926    public boolean didTouchFocusSelect() {
7927        return mTouchFocusSelected;
7928    }
7929
7930    @Override
7931    public void cancelLongPress() {
7932        super.cancelLongPress();
7933        mIgnoreActionUpEvent = true;
7934    }
7935
7936    @Override
7937    public boolean onTrackballEvent(MotionEvent event) {
7938        if (mMovement != null && mText instanceof Spannable &&
7939            mLayout != null) {
7940            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7941                return true;
7942            }
7943        }
7944
7945        return super.onTrackballEvent(event);
7946    }
7947
7948    public void setScroller(Scroller s) {
7949        mScroller = s;
7950    }
7951
7952    private static class Blink extends Handler implements Runnable {
7953        private final WeakReference<TextView> mView;
7954        private boolean mCancelled;
7955
7956        public Blink(TextView v) {
7957            mView = new WeakReference<TextView>(v);
7958        }
7959
7960        public void run() {
7961            if (mCancelled) {
7962                return;
7963            }
7964
7965            removeCallbacks(Blink.this);
7966
7967            TextView tv = mView.get();
7968
7969            if (tv != null && tv.shouldBlink()) {
7970                if (tv.mLayout != null) {
7971                    tv.invalidateCursorPath();
7972                }
7973
7974                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
7975            }
7976        }
7977
7978        void cancel() {
7979            if (!mCancelled) {
7980                removeCallbacks(Blink.this);
7981                mCancelled = true;
7982            }
7983        }
7984
7985        void uncancel() {
7986            mCancelled = false;
7987        }
7988    }
7989
7990    /**
7991     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
7992     */
7993    private boolean shouldBlink() {
7994        if (!isFocused()) return false;
7995
7996        final int start = getSelectionStart();
7997        if (start < 0) return false;
7998
7999        final int end = getSelectionEnd();
8000        if (end < 0) return false;
8001
8002        return start == end;
8003    }
8004
8005    private void makeBlink() {
8006        if (isCursorVisible()) {
8007            if (shouldBlink()) {
8008                mShowCursor = SystemClock.uptimeMillis();
8009                if (mBlink == null) mBlink = new Blink(this);
8010                mBlink.removeCallbacks(mBlink);
8011                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8012            }
8013        } else {
8014            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8015        }
8016    }
8017
8018    @Override
8019    protected float getLeftFadingEdgeStrength() {
8020        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8021        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8022            if (mMarquee != null && !mMarquee.isStopped()) {
8023                final Marquee marquee = mMarquee;
8024                if (marquee.shouldDrawLeftFade()) {
8025                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8026                } else {
8027                    return 0.0f;
8028                }
8029            } else if (getLineCount() == 1) {
8030                final int layoutDirection = getResolvedLayoutDirection();
8031                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8032                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8033                    case Gravity.LEFT:
8034                        return 0.0f;
8035                    case Gravity.RIGHT:
8036                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8037                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8038                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8039                    case Gravity.CENTER_HORIZONTAL:
8040                        return 0.0f;
8041                }
8042            }
8043        }
8044        return super.getLeftFadingEdgeStrength();
8045    }
8046
8047    @Override
8048    protected float getRightFadingEdgeStrength() {
8049        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8050        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8051            if (mMarquee != null && !mMarquee.isStopped()) {
8052                final Marquee marquee = mMarquee;
8053                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8054            } else if (getLineCount() == 1) {
8055                final int layoutDirection = getResolvedLayoutDirection();
8056                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8057                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8058                    case Gravity.LEFT:
8059                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8060                                getCompoundPaddingRight();
8061                        final float lineWidth = mLayout.getLineWidth(0);
8062                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8063                    case Gravity.RIGHT:
8064                        return 0.0f;
8065                    case Gravity.CENTER_HORIZONTAL:
8066                    case Gravity.FILL_HORIZONTAL:
8067                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8068                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8069                                getHorizontalFadingEdgeLength();
8070                }
8071            }
8072        }
8073        return super.getRightFadingEdgeStrength();
8074    }
8075
8076    @Override
8077    protected int computeHorizontalScrollRange() {
8078        if (mLayout != null) {
8079            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8080                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8081        }
8082
8083        return super.computeHorizontalScrollRange();
8084    }
8085
8086    @Override
8087    protected int computeVerticalScrollRange() {
8088        if (mLayout != null)
8089            return mLayout.getHeight();
8090
8091        return super.computeVerticalScrollRange();
8092    }
8093
8094    @Override
8095    protected int computeVerticalScrollExtent() {
8096        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8097    }
8098
8099    @Override
8100    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched) {
8101        if (TextUtils.isEmpty(searched)) {
8102            return;
8103        }
8104        CharSequence thisText = getText();
8105        if (TextUtils.isEmpty(thisText)) {
8106            return;
8107        }
8108        String searchedLowerCase = searched.toString().toLowerCase();
8109        String thisTextLowerCase = thisText.toString().toLowerCase();
8110        if (thisTextLowerCase.contains(searchedLowerCase)) {
8111            outViews.add(this);
8112        }
8113    }
8114
8115    public enum BufferType {
8116        NORMAL, SPANNABLE, EDITABLE,
8117    }
8118
8119    /**
8120     * Returns the TextView_textColor attribute from the
8121     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8122     * from the TextView_textAppearance attribute, if TextView_textColor
8123     * was not set directly.
8124     */
8125    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8126        ColorStateList colors;
8127        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8128                                         TextView_textColor);
8129
8130        if (colors == null) {
8131            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8132                                         TextView_textAppearance, -1);
8133            if (ap != -1) {
8134                TypedArray appearance;
8135                appearance = context.obtainStyledAttributes(ap,
8136                                            com.android.internal.R.styleable.TextAppearance);
8137                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8138                                                  TextAppearance_textColor);
8139                appearance.recycle();
8140            }
8141        }
8142
8143        return colors;
8144    }
8145
8146    /**
8147     * Returns the default color from the TextView_textColor attribute
8148     * from the AttributeSet, if set, or the default color from the
8149     * TextAppearance_textColor from the TextView_textAppearance attribute,
8150     * if TextView_textColor was not set directly.
8151     */
8152    public static int getTextColor(Context context,
8153                                   TypedArray attrs,
8154                                   int def) {
8155        ColorStateList colors = getTextColors(context, attrs);
8156
8157        if (colors == null) {
8158            return def;
8159        } else {
8160            return colors.getDefaultColor();
8161        }
8162    }
8163
8164    @Override
8165    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8166        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8167        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8168            switch (keyCode) {
8169            case KeyEvent.KEYCODE_A:
8170                if (canSelectText()) {
8171                    return onTextContextMenuItem(ID_SELECT_ALL);
8172                }
8173                break;
8174            case KeyEvent.KEYCODE_X:
8175                if (canCut()) {
8176                    return onTextContextMenuItem(ID_CUT);
8177                }
8178                break;
8179            case KeyEvent.KEYCODE_C:
8180                if (canCopy()) {
8181                    return onTextContextMenuItem(ID_COPY);
8182                }
8183                break;
8184            case KeyEvent.KEYCODE_V:
8185                if (canPaste()) {
8186                    return onTextContextMenuItem(ID_PASTE);
8187                }
8188                break;
8189            }
8190        }
8191        return super.onKeyShortcut(keyCode, event);
8192    }
8193
8194    /**
8195     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8196     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8197     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8198     */
8199    private boolean canSelectText() {
8200        return hasSelectionController() && mText.length() != 0;
8201    }
8202
8203    /**
8204     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8205     * The text must be spannable and the movement method must allow for arbitary selection.
8206     *
8207     * See also {@link #canSelectText()}.
8208     */
8209    private boolean textCanBeSelected() {
8210        // prepareCursorController() relies on this method.
8211        // If you change this condition, make sure prepareCursorController is called anywhere
8212        // the value of this condition might be changed.
8213        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8214        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8215    }
8216
8217    private boolean canCut() {
8218        if (hasPasswordTransformationMethod()) {
8219            return false;
8220        }
8221
8222        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8223            return true;
8224        }
8225
8226        return false;
8227    }
8228
8229    private boolean canCopy() {
8230        if (hasPasswordTransformationMethod()) {
8231            return false;
8232        }
8233
8234        if (mText.length() > 0 && hasSelection()) {
8235            return true;
8236        }
8237
8238        return false;
8239    }
8240
8241    private boolean canPaste() {
8242        return (mText instanceof Editable &&
8243                mInput != null &&
8244                getSelectionStart() >= 0 &&
8245                getSelectionEnd() >= 0 &&
8246                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8247                hasPrimaryClip());
8248    }
8249
8250    private static long packRangeInLong(int start, int end) {
8251        return (((long) start) << 32) | end;
8252    }
8253
8254    private static int extractRangeStartFromLong(long range) {
8255        return (int) (range >>> 32);
8256    }
8257
8258    private static int extractRangeEndFromLong(long range) {
8259        return (int) (range & 0x00000000FFFFFFFFL);
8260    }
8261
8262    private boolean selectAll() {
8263        final int length = mText.length();
8264        Selection.setSelection((Spannable) mText, 0, length);
8265        return length > 0;
8266    }
8267
8268    /**
8269     * Adjusts selection to the word under last touch offset.
8270     * Return true if the operation was successfully performed.
8271     */
8272    private boolean selectCurrentWord() {
8273        if (!canSelectText()) {
8274            return false;
8275        }
8276
8277        if (hasPasswordTransformationMethod()) {
8278            // Always select all on a password field.
8279            // Cut/copy menu entries are not available for passwords, but being able to select all
8280            // is however useful to delete or paste to replace the entire content.
8281            return selectAll();
8282        }
8283
8284        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8285        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8286
8287        // Specific text field types: select the entire text for these
8288        if (klass == InputType.TYPE_CLASS_NUMBER ||
8289                klass == InputType.TYPE_CLASS_PHONE ||
8290                klass == InputType.TYPE_CLASS_DATETIME ||
8291                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8292                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8293                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8294                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8295            return selectAll();
8296        }
8297
8298        long lastTouchOffsets = getLastTouchOffsets();
8299        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8300        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8301
8302        // Safety check in case standard touch event handling has been bypassed
8303        if (minOffset < 0 || minOffset >= mText.length()) return false;
8304        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8305
8306        int selectionStart, selectionEnd;
8307
8308        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8309        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8310        if (urlSpans.length == 1) {
8311            URLSpan url = urlSpans[0];
8312            selectionStart = ((Spanned) mText).getSpanStart(url);
8313            selectionEnd = ((Spanned) mText).getSpanEnd(url);
8314        } else {
8315            if (mWordIterator == null) {
8316                mWordIterator = new WordIterator();
8317            }
8318            // WordIerator handles text changes, this is a no-op if text in unchanged.
8319            mWordIterator.setCharSequence(mText);
8320
8321            selectionStart = mWordIterator.getBeginning(minOffset);
8322            if (selectionStart == BreakIterator.DONE) return false;
8323
8324            selectionEnd = mWordIterator.getEnd(maxOffset);
8325            if (selectionEnd == BreakIterator.DONE) return false;
8326        }
8327
8328        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8329        return true;
8330    }
8331
8332    private long getLastTouchOffsets() {
8333        int minOffset, maxOffset;
8334
8335        if (mContextMenuTriggeredByKey) {
8336            minOffset = getSelectionStart();
8337            maxOffset = getSelectionEnd();
8338        } else {
8339            SelectionModifierCursorController selectionController = getSelectionController();
8340            minOffset = selectionController.getMinTouchOffset();
8341            maxOffset = selectionController.getMaxTouchOffset();
8342        }
8343
8344        return packRangeInLong(minOffset, maxOffset);
8345    }
8346
8347    @Override
8348    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8349        super.onPopulateAccessibilityEvent(event);
8350
8351        final boolean isPassword = hasPasswordTransformationMethod();
8352        if (!isPassword) {
8353            CharSequence text = getText();
8354            if (TextUtils.isEmpty(text)) {
8355                text = getHint();
8356            }
8357            if (!TextUtils.isEmpty(text)) {
8358                event.getText().add(text);
8359            }
8360        }
8361    }
8362
8363    @Override
8364    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8365        super.onInitializeAccessibilityEvent(event);
8366
8367        final boolean isPassword = hasPasswordTransformationMethod();
8368        event.setPassword(isPassword);
8369
8370        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
8371            event.setFromIndex(Selection.getSelectionStart(mText));
8372            event.setToIndex(Selection.getSelectionEnd(mText));
8373            event.setItemCount(mText.length());
8374        }
8375    }
8376
8377    @Override
8378    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
8379        super.onInitializeAccessibilityNodeInfo(info);
8380
8381        final boolean isPassword = hasPasswordTransformationMethod();
8382        if (!isPassword) {
8383            info.setText(getText());
8384        }
8385        info.setPassword(isPassword);
8386    }
8387
8388    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
8389            int fromIndex, int removedCount, int addedCount) {
8390        AccessibilityEvent event =
8391            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
8392        event.setFromIndex(fromIndex);
8393        event.setRemovedCount(removedCount);
8394        event.setAddedCount(addedCount);
8395        event.setBeforeText(beforeText);
8396        sendAccessibilityEventUnchecked(event);
8397    }
8398
8399    @Override
8400    protected void onCreateContextMenu(ContextMenu menu) {
8401        super.onCreateContextMenu(menu);
8402        boolean added = false;
8403        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
8404        // Problem with context menu on long press: the menu appears while the key in down and when
8405        // the key is released, the view does not receive the key_up event.
8406        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
8407        // events. We cannot simply clear these flags in onTextContextMenuItem since
8408        // it may not be called (if the user/ discards the context menu with the back key).
8409        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
8410        // available in onTextContextMenuItem.
8411        mDPadCenterIsDown = mEnterKeyIsDown = false;
8412
8413        MenuHandler handler = new MenuHandler();
8414
8415        if (mText instanceof Spanned && hasSelectionController()) {
8416            long lastTouchOffset = getLastTouchOffsets();
8417            final int selStart = extractRangeStartFromLong(lastTouchOffset);
8418            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
8419
8420            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
8421            if (urls.length > 0) {
8422                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
8423                        setOnMenuItemClickListener(handler);
8424
8425                added = true;
8426            }
8427        }
8428
8429        // The context menu is not empty, which will prevent the selection mode from starting.
8430        // Add a entry to start it in the context menu.
8431        // TODO Does not handle the case where a subclass does not call super.thisMethod or
8432        // populates the menu AFTER this call.
8433        if (menu.size() > 0) {
8434            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
8435                    setOnMenuItemClickListener(handler);
8436            added = true;
8437        }
8438
8439        if (added) {
8440            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
8441        }
8442    }
8443
8444    /**
8445     * Returns whether this text view is a current input method target.  The
8446     * default implementation just checks with {@link InputMethodManager}.
8447     */
8448    public boolean isInputMethodTarget() {
8449        InputMethodManager imm = InputMethodManager.peekInstance();
8450        return imm != null && imm.isActive(this);
8451    }
8452
8453    // Selection context mode
8454    private static final int ID_SELECT_ALL = android.R.id.selectAll;
8455    private static final int ID_CUT = android.R.id.cut;
8456    private static final int ID_COPY = android.R.id.copy;
8457    private static final int ID_PASTE = android.R.id.paste;
8458    // Context menu entries
8459    private static final int ID_COPY_URL = android.R.id.copyUrl;
8460    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
8461
8462    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
8463        public boolean onMenuItemClick(MenuItem item) {
8464            return onTextContextMenuItem(item.getItemId());
8465        }
8466    }
8467
8468    /**
8469     * Called when a context menu option for the text view is selected.  Currently
8470     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
8471     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
8472     * or {@link android.R.id#copy}.
8473     *
8474     * @return true if the context menu item action was performed.
8475     */
8476    public boolean onTextContextMenuItem(int id) {
8477        int min = 0;
8478        int max = mText.length();
8479
8480        if (isFocused()) {
8481            final int selStart = getSelectionStart();
8482            final int selEnd = getSelectionEnd();
8483
8484            min = Math.max(0, Math.min(selStart, selEnd));
8485            max = Math.max(0, Math.max(selStart, selEnd));
8486        }
8487
8488        switch (id) {
8489            case ID_COPY_URL:
8490                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
8491                if (urls.length >= 1) {
8492                    ClipData clip = null;
8493                    for (int i=0; i<urls.length; i++) {
8494                        Uri uri = Uri.parse(urls[0].getURL());
8495                        if (clip == null) {
8496                            clip = ClipData.newRawUri(null, uri);
8497                        } else {
8498                            clip.addItem(new ClipData.Item(uri));
8499                        }
8500                    }
8501                    if (clip != null) {
8502                        setPrimaryClip(clip);
8503                    }
8504                }
8505                stopSelectionActionMode();
8506                return true;
8507
8508            case ID_SELECTION_MODE:
8509                if (mSelectionActionMode != null) {
8510                    // Selection mode is already started, simply change selected part.
8511                    selectCurrentWord();
8512                } else {
8513                    startSelectionActionMode();
8514                }
8515                return true;
8516
8517            case ID_SELECT_ALL:
8518                // This does not enter text selection mode. Text is highlighted, so that it can be
8519                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
8520                selectAll();
8521                return true;
8522
8523            case ID_PASTE:
8524                paste(min, max);
8525                return true;
8526
8527            case ID_CUT:
8528                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8529                ((Editable) mText).delete(min, max);
8530                stopSelectionActionMode();
8531                return true;
8532
8533            case ID_COPY:
8534                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8535                stopSelectionActionMode();
8536                return true;
8537        }
8538        return false;
8539    }
8540
8541    /**
8542     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8543     * by [min, max] when replacing this region by paste.
8544     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8545     * make sure we do not add an extra one from the paste content.
8546     */
8547    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8548        if (paste.length() > 0) {
8549            if (min > 0) {
8550                final char charBefore = mTransformed.charAt(min - 1);
8551                final char charAfter = paste.charAt(0);
8552
8553                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8554                    // Two spaces at beginning of paste: remove one
8555                    final int originalLength = mText.length();
8556                    ((Editable) mText).delete(min - 1, min);
8557                    // Due to filters, there is no guarantee that exactly one character was
8558                    // removed: count instead.
8559                    final int delta = mText.length() - originalLength;
8560                    min += delta;
8561                    max += delta;
8562                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8563                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8564                    // No space at beginning of paste: add one
8565                    final int originalLength = mText.length();
8566                    ((Editable) mText).replace(min, min, " ");
8567                    // Taking possible filters into account as above.
8568                    final int delta = mText.length() - originalLength;
8569                    min += delta;
8570                    max += delta;
8571                }
8572            }
8573
8574            if (max < mText.length()) {
8575                final char charBefore = paste.charAt(paste.length() - 1);
8576                final char charAfter = mTransformed.charAt(max);
8577
8578                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8579                    // Two spaces at end of paste: remove one
8580                    ((Editable) mText).delete(max, max + 1);
8581                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8582                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8583                    // No space at end of paste: add one
8584                    ((Editable) mText).replace(max, max, " ");
8585                }
8586            }
8587        }
8588
8589        return packRangeInLong(min, max);
8590    }
8591
8592    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8593        TextView shadowView = (TextView) inflate(mContext,
8594                com.android.internal.R.layout.text_drag_thumbnail, null);
8595
8596        if (shadowView == null) {
8597            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8598        }
8599
8600        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8601            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8602        }
8603        shadowView.setText(text);
8604        shadowView.setTextColor(getTextColors());
8605
8606        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8607        shadowView.setGravity(Gravity.CENTER);
8608
8609        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8610                ViewGroup.LayoutParams.WRAP_CONTENT));
8611
8612        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8613        shadowView.measure(size, size);
8614
8615        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8616        shadowView.invalidate();
8617        return new DragShadowBuilder(shadowView);
8618    }
8619
8620    private static class DragLocalState {
8621        public TextView sourceTextView;
8622        public int start, end;
8623
8624        public DragLocalState(TextView sourceTextView, int start, int end) {
8625            this.sourceTextView = sourceTextView;
8626            this.start = start;
8627            this.end = end;
8628        }
8629    }
8630
8631    @Override
8632    public boolean performLongClick() {
8633        if (super.performLongClick()) {
8634            mDiscardNextActionUp = true;
8635            return true;
8636        }
8637
8638        boolean handled = false;
8639
8640        // Long press in empty space moves cursor and shows the Paste affordance if available.
8641        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8642                mInsertionControllerEnabled) {
8643            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
8644            stopSelectionActionMode();
8645            Selection.setSelection((Spannable) mText, offset);
8646            getInsertionController().showWithPaste();
8647            handled = true;
8648        }
8649
8650        if (!handled && mSelectionActionMode != null) {
8651            if (touchPositionIsInSelection()) {
8652                // Start a drag
8653                final int start = getSelectionStart();
8654                final int end = getSelectionEnd();
8655                CharSequence selectedText = mTransformed.subSequence(start, end);
8656                ClipData data = ClipData.newPlainText(null, selectedText);
8657                DragLocalState localState = new DragLocalState(this, start, end);
8658                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8659                stopSelectionActionMode();
8660            } else {
8661                selectCurrentWord();
8662            }
8663            handled = true;
8664        }
8665
8666        // Start a new selection
8667        handled |= !handled && startSelectionActionMode();
8668
8669        if (handled) {
8670            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8671            mDiscardNextActionUp = true;
8672        }
8673
8674        return handled;
8675    }
8676
8677    private boolean touchPositionIsInSelection() {
8678        int selectionStart = getSelectionStart();
8679        int selectionEnd = getSelectionEnd();
8680
8681        if (selectionStart == selectionEnd) {
8682            return false;
8683        }
8684
8685        if (selectionStart > selectionEnd) {
8686            int tmp = selectionStart;
8687            selectionStart = selectionEnd;
8688            selectionEnd = tmp;
8689            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8690        }
8691
8692        SelectionModifierCursorController selectionController = getSelectionController();
8693        int minOffset = selectionController.getMinTouchOffset();
8694        int maxOffset = selectionController.getMaxTouchOffset();
8695
8696        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8697    }
8698
8699    private static class SuggestionRangeSpan extends UnderlineSpan {
8700        // TODO themable, would be nice to make it a child class of TextAppearanceSpan, but
8701        // there is no way to have underline and TextAppearanceSpan.
8702    }
8703
8704    private class SuggestionsPopupWindow implements OnClickListener {
8705        private static final int MAX_NUMBER_SUGGESTIONS = 5;
8706        private static final int NO_SUGGESTIONS = -1;
8707        private final PopupWindow mContainer;
8708        private final ViewGroup[] mSuggestionViews = new ViewGroup[2];
8709        private final int[] mSuggestionViewLayouts = new int[] {
8710                mTextEditSuggestionsBottomWindowLayout, mTextEditSuggestionsTopWindowLayout};
8711        private WordIterator mSuggestionWordIterator;
8712        private TextAppearanceSpan[] mHighlightSpans = new TextAppearanceSpan[0];
8713
8714        public SuggestionsPopupWindow() {
8715            mContainer = new PopupWindow(TextView.this.mContext, null,
8716                    com.android.internal.R.attr.textSuggestionsWindowStyle);
8717            mContainer.setSplitTouchEnabled(true);
8718            mContainer.setClippingEnabled(false);
8719            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8720
8721            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8722            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8723        }
8724
8725        private class SuggestionInfo {
8726            int suggestionStart, suggestionEnd; // range of suggestion item with replacement text
8727            int spanStart, spanEnd; // range in TextView where text should be inserted
8728            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
8729            int suggestionIndex; // the index of the suggestion inside suggestionSpan
8730        }
8731
8732        private ViewGroup getViewGroup(boolean under) {
8733            final int viewIndex = under ? 0 : 1;
8734            ViewGroup viewGroup = mSuggestionViews[viewIndex];
8735
8736            if (viewGroup == null) {
8737                final int layout = mSuggestionViewLayouts[viewIndex];
8738                LayoutInflater inflater = (LayoutInflater) TextView.this.mContext.
8739                        getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8740
8741                if (inflater == null) {
8742                    throw new IllegalArgumentException(
8743                            "Unable to create TextEdit suggestion window inflater");
8744                }
8745
8746                View view = inflater.inflate(layout, null);
8747
8748                if (! (view instanceof ViewGroup)) {
8749                    throw new IllegalArgumentException(
8750                            "Inflated TextEdit suggestion window is not a ViewGroup: " + view);
8751                }
8752
8753                viewGroup = (ViewGroup) view;
8754
8755                // Inflate the suggestion items once and for all.
8756                for (int i = 0; i < MAX_NUMBER_SUGGESTIONS; i++) {
8757                    View childView = inflater.inflate(mTextEditSuggestionItemLayout, viewGroup,
8758                            false);
8759
8760                    if (! (childView instanceof TextView)) {
8761                        throw new IllegalArgumentException(
8762                               "Inflated TextEdit suggestion item is not a TextView: " + childView);
8763                    }
8764
8765                    childView.setTag(new SuggestionInfo());
8766                    viewGroup.addView(childView);
8767                    childView.setOnClickListener(this);
8768                }
8769
8770                mSuggestionViews[viewIndex] = viewGroup;
8771            }
8772
8773            return viewGroup;
8774        }
8775
8776        public void show() {
8777            if (!(mText instanceof Editable)) return;
8778
8779            final int pos = TextView.this.getSelectionStart();
8780            Spannable spannable = (Spannable)TextView.this.mText;
8781            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
8782            final int nbSpans = suggestionSpans.length;
8783
8784            ViewGroup viewGroup = getViewGroup(true);
8785            mContainer.setContentView(viewGroup);
8786
8787            int totalNbSuggestions = 0;
8788            int spanUnionStart = mText.length();
8789            int spanUnionEnd = 0;
8790
8791            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
8792                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
8793                final int spanStart = spannable.getSpanStart(suggestionSpan);
8794                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
8795                spanUnionStart = Math.min(spanStart, spanUnionStart);
8796                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
8797
8798                String[] suggestions = suggestionSpan.getSuggestions();
8799                int nbSuggestions = suggestions.length;
8800                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
8801                    TextView textView = (TextView) viewGroup.getChildAt(totalNbSuggestions);
8802                    textView.setText(suggestions[suggestionIndex]);
8803                    SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
8804                    suggestionInfo.spanStart = spanStart;
8805                    suggestionInfo.spanEnd = spanEnd;
8806                    suggestionInfo.suggestionSpan = suggestionSpan;
8807                    suggestionInfo.suggestionIndex = suggestionIndex;
8808
8809                    totalNbSuggestions++;
8810                    if (totalNbSuggestions == MAX_NUMBER_SUGGESTIONS) {
8811                        // Also end outer for loop
8812                        spanIndex = nbSpans;
8813                        break;
8814                    }
8815                }
8816            }
8817
8818            if (totalNbSuggestions == 0) {
8819                // TODO Replace by final text, use a dedicated layout, add a fade out timer...
8820                TextView textView = (TextView) viewGroup.getChildAt(0);
8821                textView.setText("No suggestions available");
8822                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
8823                suggestionInfo.spanStart = NO_SUGGESTIONS;
8824                totalNbSuggestions++;
8825            } else {
8826                if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
8827                ((Editable) mText).setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
8828                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8829
8830                for (int i = 0; i < totalNbSuggestions; i++) {
8831                    final TextView textView = (TextView) viewGroup.getChildAt(i);
8832                    highlightTextDifferences(textView, spanUnionStart, spanUnionEnd);
8833                }
8834            }
8835
8836            for (int i = 0; i < MAX_NUMBER_SUGGESTIONS; i++) {
8837                viewGroup.getChildAt(i).setVisibility(i < totalNbSuggestions ? VISIBLE : GONE);
8838            }
8839
8840            final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8841            viewGroup.measure(size, size);
8842
8843            positionAtCursor();
8844        }
8845
8846        private long[] getWordLimits(CharSequence text) {
8847            // TODO locale for mSuggestionWordIterator
8848            if (mSuggestionWordIterator == null) mSuggestionWordIterator = new WordIterator();
8849            mSuggestionWordIterator.setCharSequence(text);
8850
8851            // First pass will simply count the number of words to be able to create an array
8852            // Not too expensive since previous break positions are cached by the BreakIterator
8853            int nbWords = 0;
8854            int position = mSuggestionWordIterator.following(0);
8855            while (position != BreakIterator.DONE) {
8856                nbWords++;
8857                position = mSuggestionWordIterator.following(position);
8858            }
8859
8860            int index = 0;
8861            long[] result = new long[nbWords];
8862
8863            position = mSuggestionWordIterator.following(0);
8864            while (position != BreakIterator.DONE) {
8865                int wordStart = mSuggestionWordIterator.getBeginning(position);
8866                result[index++] = packRangeInLong(wordStart, position);
8867                position = mSuggestionWordIterator.following(position);
8868            }
8869
8870            return result;
8871        }
8872
8873        private TextAppearanceSpan highlightSpan(int index) {
8874            final int length = mHighlightSpans.length;
8875            if (index < length) {
8876                return mHighlightSpans[index];
8877            }
8878
8879            // Assumes indexes are requested in sequence: simply append one more item
8880            TextAppearanceSpan[] newArray = new TextAppearanceSpan[length + 1];
8881            System.arraycopy(mHighlightSpans, 0, newArray, 0, length);
8882            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
8883                    android.R.style.TextAppearance_SuggestionHighlight);
8884            newArray[length] = highlightSpan;
8885            mHighlightSpans = newArray;
8886            return highlightSpan;
8887        }
8888
8889        private void highlightTextDifferences(TextView textView, int unionStart, int unionEnd) {
8890            SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
8891            final int spanStart = suggestionInfo.spanStart;
8892            final int spanEnd = suggestionInfo.spanEnd;
8893
8894            // Remove all text formating by converting to Strings
8895            final String text = textView.getText().toString();
8896            final String sourceText = mText.subSequence(spanStart, spanEnd).toString();
8897
8898            long[] sourceWordLimits = getWordLimits(sourceText);
8899            long[] wordLimits = getWordLimits(text);
8900
8901            SpannableStringBuilder ssb = new SpannableStringBuilder();
8902            // span [spanStart, spanEnd] is included in union [spanUnionStart, int spanUnionEnd]
8903            // The final result is made of 3 parts: the text before, between and after the span
8904            // This is the text before, provided for context
8905            ssb.append(mText.subSequence(unionStart, spanStart).toString());
8906
8907            // shift is used to offset spans positions wrt span's beginning
8908            final int shift = spanStart - unionStart;
8909            suggestionInfo.suggestionStart = shift;
8910            suggestionInfo.suggestionEnd = shift + text.length();
8911
8912            // This is the actual suggestion text, which will be highlighted by the following code
8913            ssb.append(text);
8914
8915            String[] words = new String[wordLimits.length];
8916            for (int i = 0; i < wordLimits.length; i++) {
8917                int wordStart = extractRangeStartFromLong(wordLimits[i]);
8918                int wordEnd = extractRangeEndFromLong(wordLimits[i]);
8919                words[i] = text.substring(wordStart, wordEnd);
8920            }
8921
8922            // Highlighted word algorithm is based on word matching between source and text
8923            // Matching words are found from left to right. TODO: change for RTL languages
8924            // Characters between matching words are highlighted
8925            int previousCommonWordIndex = -1;
8926            int nbHighlightSpans = 0;
8927            for (int i = 0; i < sourceWordLimits.length; i++) {
8928                int wordStart = extractRangeStartFromLong(sourceWordLimits[i]);
8929                int wordEnd = extractRangeEndFromLong(sourceWordLimits[i]);
8930                String sourceWord = sourceText.substring(wordStart, wordEnd);
8931
8932                for (int j = previousCommonWordIndex + 1; j < words.length; j++) {
8933                    if (sourceWord.equals(words[j])) {
8934                        if (j != previousCommonWordIndex + 1) {
8935                            int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
8936                                extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
8937                            int lastDifferentPosition = extractRangeStartFromLong(wordLimits[j]);
8938                            ssb.setSpan(highlightSpan(nbHighlightSpans++),
8939                                    shift + firstDifferentPosition, shift + lastDifferentPosition,
8940                                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8941                        } else {
8942                            // Compare characters between words
8943                            int previousSourceWordEnd = i == 0 ? 0 :
8944                                extractRangeEndFromLong(sourceWordLimits[i - 1]);
8945                            int sourceWordStart = extractRangeStartFromLong(sourceWordLimits[i]);
8946                            String sourceSpaces = sourceText.substring(previousSourceWordEnd,
8947                                    sourceWordStart);
8948
8949                            int previousWordEnd = j == 0 ? 0 :
8950                                extractRangeEndFromLong(wordLimits[j - 1]);
8951                            int currentWordStart = extractRangeStartFromLong(wordLimits[j]);
8952                            String textSpaces = text.substring(previousWordEnd, currentWordStart);
8953
8954                            if (!sourceSpaces.equals(textSpaces)) {
8955                                ssb.setSpan(highlightSpan(nbHighlightSpans++),
8956                                        shift + previousWordEnd, shift + currentWordStart,
8957                                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8958                            }
8959                        }
8960                        previousCommonWordIndex = j;
8961                        break;
8962                    }
8963                }
8964            }
8965
8966            // Finally, compare ends of Strings
8967            if (previousCommonWordIndex < words.length - 1) {
8968                int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
8969                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
8970                int lastDifferentPosition = textView.length();
8971                ssb.setSpan(highlightSpan(nbHighlightSpans++),
8972                        shift + firstDifferentPosition, shift + lastDifferentPosition,
8973                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8974            } else {
8975                int lastSourceWordEnd = sourceWordLimits.length == 0 ? 0 :
8976                    extractRangeEndFromLong(sourceWordLimits[sourceWordLimits.length - 1]);
8977                String sourceSpaces = sourceText.substring(lastSourceWordEnd, sourceText.length());
8978
8979                int lastCommonTextWordEnd = previousCommonWordIndex < 0 ? 0 :
8980                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
8981                String textSpaces = text.substring(lastCommonTextWordEnd, textView.length());
8982
8983                if (!sourceSpaces.equals(textSpaces) && textSpaces.length() > 0) {
8984                    ssb.setSpan(highlightSpan(nbHighlightSpans++),
8985                            shift + lastCommonTextWordEnd, shift + textView.length(),
8986                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8987                }
8988            }
8989
8990            // Final part, text after the current suggestion range.
8991            ssb.append(mText.subSequence(spanEnd, unionEnd).toString());
8992            textView.setText(ssb);
8993        }
8994
8995        public void hide() {
8996            if ((mText instanceof Editable) && mSuggestionRangeSpan != null) {
8997                ((Editable) mText).removeSpan(mSuggestionRangeSpan);
8998            }
8999            mContainer.dismiss();
9000        }
9001
9002        @Override
9003        public void onClick(View view) {
9004            if (view instanceof TextView) {
9005                TextView textView = (TextView) view;
9006                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9007                final int spanStart = suggestionInfo.spanStart;
9008                final int spanEnd = suggestionInfo.spanEnd;
9009                if (spanStart != NO_SUGGESTIONS) {
9010                    // SuggestionSpans are removed by replace: save them before
9011                    Editable editable = ((Editable) mText);
9012                    SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9013                            SuggestionSpan.class);
9014                    final int length = suggestionSpans.length;
9015                    int[] suggestionSpansStarts = new int[length];
9016                    int[] suggestionSpansEnds = new int[length];
9017                    int[] suggestionSpansFlags = new int[length];
9018                    for (int i = 0; i < length; i++) {
9019                        final SuggestionSpan suggestionSpan = suggestionSpans[i];
9020                        suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9021                        suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9022                        suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9023                    }
9024
9025                    final int suggestionStart = suggestionInfo.suggestionStart;
9026                    final int suggestionEnd = suggestionInfo.suggestionEnd;
9027                    final String suggestion = textView.getText().subSequence(
9028                            suggestionStart, suggestionEnd).toString();
9029                    final String originalText = mText.subSequence(spanStart, spanEnd).toString();
9030                    ((Editable) mText).replace(spanStart, spanEnd, suggestion);
9031
9032                    // Notify source IME of the suggestion pick. Do this before swaping texts.
9033                    if (!TextUtils.isEmpty(
9034                            suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9035                        InputMethodManager imm = InputMethodManager.peekInstance();
9036                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9037                                suggestionInfo.suggestionIndex);
9038                    }
9039
9040                    // Swap text content between actual text and Suggestion span
9041                    String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9042                    suggestions[suggestionInfo.suggestionIndex] = originalText;
9043
9044                    // Restore previous SuggestionSpans
9045                    final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9046                    for (int i = 0; i < length; i++) {
9047                        // Only spans that include the modified region make sense after replacement
9048                        // Spans partially included in the replaced region are removed, there is no
9049                        // way to assign them a valid range after replacement
9050                        if (suggestionSpansStarts[i] <= spanStart &&
9051                                suggestionSpansEnds[i] >= spanEnd) {
9052                            editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
9053                                    suggestionSpansEnds[i] + lengthDifference,
9054                                    suggestionSpansFlags[i]);
9055                        }
9056                    }
9057                }
9058            }
9059            hide();
9060        }
9061
9062        void positionAtCursor() {
9063            View contentView = mContainer.getContentView();
9064            int width = contentView.getMeasuredWidth();
9065            int height = contentView.getMeasuredHeight();
9066            final int offset = TextView.this.getSelectionStart();
9067            final int line = mLayout.getLineForOffset(offset);
9068            final int lineBottom = mLayout.getLineBottom(line);
9069            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
9070
9071            final Rect bounds = sCursorControllerTempRect;
9072            bounds.left = (int) (primaryHorizontal - width / 2.0f);
9073            bounds.top = lineBottom;
9074
9075            bounds.right = bounds.left + width;
9076            bounds.bottom = bounds.top + height;
9077
9078            convertFromViewportToContentCoordinates(bounds);
9079
9080            final int[] coords = mTempCoords;
9081            TextView.this.getLocationInWindow(coords);
9082            coords[0] += bounds.left;
9083            coords[1] += bounds.top;
9084
9085            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9086            final int screenHeight = displayMetrics.heightPixels;
9087
9088            // Vertical clipping
9089            if (coords[1] + height > screenHeight) {
9090                // Try to position above current line instead
9091                // TODO use top layout instead, reverse suggestion order,
9092                // try full screen vertical down if it still does not fit. TBD with designers.
9093
9094                // Update dimensions from new view
9095                contentView = mContainer.getContentView();
9096                width = contentView.getMeasuredWidth();
9097                height = contentView.getMeasuredHeight();
9098
9099                final int lineTop = mLayout.getLineTop(line);
9100                final int lineHeight = lineBottom - lineTop;
9101                coords[1] -= height + lineHeight;
9102            }
9103
9104            // Horizontal clipping
9105            coords[0] = Math.max(0, coords[0]);
9106            coords[0] = Math.min(displayMetrics.widthPixels - width, coords[0]);
9107
9108            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
9109        }
9110    }
9111
9112    void showSuggestions() {
9113        if (!mSuggestionsEnabled || !isTextEditable()) return;
9114
9115        if (mSuggestionsPopupWindow == null) {
9116            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
9117        }
9118        hideControllers();
9119        mSuggestionsPopupWindow.show();
9120    }
9121
9122    void hideSuggestions() {
9123        if (mSuggestionsPopupWindow != null) {
9124            mSuggestionsPopupWindow.hide();
9125        }
9126    }
9127
9128    /**
9129     * Some parts of the text can have alternate suggestion text attached. This is typically done by
9130     * the IME by adding {@link SuggestionSpan}s to the text.
9131     *
9132     * When suggestions are enabled (default), this list of suggestions will be displayed when the
9133     * user double taps on these parts of the text. No suggestions are displayed when this value is
9134     * false. Use {@link #setSuggestionsEnabled(boolean)} to change this value.
9135     *
9136     * @return true if the suggestions popup window is enabled.
9137     *
9138     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9139     */
9140    public boolean isSuggestionsEnabled() {
9141        return mSuggestionsEnabled;
9142    }
9143
9144    /**
9145     * Enables or disables the suggestion popup. See {@link #isSuggestionsEnabled()}.
9146     *
9147     * @param enabled Whether or not suggestions are enabled.
9148     */
9149    public void setSuggestionsEnabled(boolean enabled) {
9150        mSuggestionsEnabled = enabled;
9151    }
9152
9153    /**
9154     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
9155     * selection is initiated in this View.
9156     *
9157     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
9158     * Paste actions, depending on what this View supports.
9159     *
9160     * A custom implementation can add new entries in the default menu in its
9161     * {@link ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The default actions
9162     * can also be removed from the menu using {@link Menu#removeItem(int)} and passing
9163     * {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy} or
9164     * {@link android.R.id#paste} ids as parameters.
9165     *
9166     * Returning false from {@link ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will
9167     * prevent the action mode from being started.
9168     *
9169     * Action click events should be handled by the custom implementation of
9170     * {@link ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
9171     *
9172     * Note that text selection mode is not started when a TextView receives focus and the
9173     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
9174     * that case, to allow for quick replacement.
9175     */
9176    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
9177        mCustomSelectionActionModeCallback = actionModeCallback;
9178    }
9179
9180    /**
9181     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
9182     *
9183     * @return The current custom selection callback.
9184     */
9185    public ActionMode.Callback getCustomSelectionActionModeCallback() {
9186        return mCustomSelectionActionModeCallback;
9187    }
9188
9189    /**
9190     *
9191     * @return true if the selection mode was actually started.
9192     */
9193    private boolean startSelectionActionMode() {
9194        if (mSelectionActionMode != null) {
9195            // Selection action mode is already started
9196            return false;
9197        }
9198
9199        if (!canSelectText() || !requestFocus()) {
9200            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
9201            return false;
9202        }
9203
9204        if (!hasSelection()) {
9205            // There may already be a selection on device rotation
9206            boolean currentWordSelected = selectCurrentWord();
9207            if (!currentWordSelected) {
9208                // No word found under cursor or text selection not permitted.
9209                return false;
9210            }
9211        }
9212
9213        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
9214        mSelectionActionMode = startActionMode(actionModeCallback);
9215        final boolean selectionStarted = mSelectionActionMode != null;
9216
9217        if (selectionStarted && !mTextIsSelectable) {
9218            // Show the IME to be able to replace text, except when selecting non editable text.
9219            final InputMethodManager imm = InputMethodManager.peekInstance();
9220            if (imm != null) imm.showSoftInput(this, 0, null);
9221        }
9222
9223        return selectionStarted;
9224    }
9225
9226    private void stopSelectionActionMode() {
9227        if (mSelectionActionMode != null) {
9228            // This will hide the mSelectionModifierCursorController
9229            mSelectionActionMode.finish();
9230        }
9231    }
9232
9233    /**
9234     * Paste clipboard content between min and max positions.
9235     */
9236    private void paste(int min, int max) {
9237        ClipboardManager clipboard =
9238            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
9239        ClipData clip = clipboard.getPrimaryClip();
9240        if (clip != null) {
9241            boolean didFirst = false;
9242            for (int i=0; i<clip.getItemCount(); i++) {
9243                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
9244                if (paste != null) {
9245                    if (!didFirst) {
9246                        long minMax = prepareSpacesAroundPaste(min, max, paste);
9247                        min = extractRangeStartFromLong(minMax);
9248                        max = extractRangeEndFromLong(minMax);
9249                        Selection.setSelection((Spannable) mText, max);
9250                        ((Editable) mText).replace(min, max, paste);
9251                        didFirst = true;
9252                    } else {
9253                        ((Editable) mText).insert(getSelectionEnd(), "\n");
9254                        ((Editable) mText).insert(getSelectionEnd(), paste);
9255                    }
9256                }
9257            }
9258            stopSelectionActionMode();
9259            sLastCutOrCopyTime = 0;
9260        }
9261    }
9262
9263    private void setPrimaryClip(ClipData clip) {
9264        ClipboardManager clipboard = (ClipboardManager) getContext().
9265                getSystemService(Context.CLIPBOARD_SERVICE);
9266        clipboard.setPrimaryClip(clip);
9267        sLastCutOrCopyTime = SystemClock.uptimeMillis();
9268    }
9269
9270    /**
9271     * An ActionMode Callback class that is used to provide actions while in text selection mode.
9272     *
9273     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
9274     * on which of these this TextView supports.
9275     */
9276    private class SelectionActionModeCallback implements ActionMode.Callback {
9277
9278        @Override
9279        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
9280            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
9281
9282            boolean allowText = getContext().getResources().getBoolean(
9283                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
9284
9285            mode.setTitle(allowText ?
9286                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
9287            mode.setSubtitle(null);
9288
9289            int selectAllIconId = 0; // No icon by default
9290            if (!allowText) {
9291                // Provide an icon, text will not be displayed on smaller screens.
9292                selectAllIconId = styledAttributes.getResourceId(
9293                        R.styleable.Theme_actionModeSelectAllDrawable, 0);
9294            }
9295
9296            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
9297                    setIcon(selectAllIconId).
9298                    setAlphabeticShortcut('a').
9299                    setShowAsAction(
9300                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9301
9302            if (canCut()) {
9303                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
9304                    setIcon(styledAttributes.getResourceId(
9305                            R.styleable.Theme_actionModeCutDrawable, 0)).
9306                    setAlphabeticShortcut('x').
9307                    setShowAsAction(
9308                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9309            }
9310
9311            if (canCopy()) {
9312                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
9313                    setIcon(styledAttributes.getResourceId(
9314                            R.styleable.Theme_actionModeCopyDrawable, 0)).
9315                    setAlphabeticShortcut('c').
9316                    setShowAsAction(
9317                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9318            }
9319
9320            if (canPaste()) {
9321                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
9322                        setIcon(styledAttributes.getResourceId(
9323                                R.styleable.Theme_actionModePasteDrawable, 0)).
9324                        setAlphabeticShortcut('v').
9325                        setShowAsAction(
9326                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9327            }
9328
9329            styledAttributes.recycle();
9330
9331            if (mCustomSelectionActionModeCallback != null) {
9332                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
9333                    // The custom mode can choose to cancel the action mode
9334                    return false;
9335                }
9336            }
9337
9338            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
9339                getSelectionController().show();
9340                return true;
9341            } else {
9342                return false;
9343            }
9344        }
9345
9346        @Override
9347        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
9348            if (mCustomSelectionActionModeCallback != null) {
9349                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
9350            }
9351            return true;
9352        }
9353
9354        @Override
9355        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
9356            if (mCustomSelectionActionModeCallback != null &&
9357                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
9358                return true;
9359            }
9360            return onTextContextMenuItem(item.getItemId());
9361        }
9362
9363        @Override
9364        public void onDestroyActionMode(ActionMode mode) {
9365            if (mCustomSelectionActionModeCallback != null) {
9366                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
9367            }
9368            Selection.setSelection((Spannable) mText, getSelectionEnd());
9369
9370            if (mSelectionModifierCursorController != null) {
9371                mSelectionModifierCursorController.hide();
9372            }
9373
9374            mSelectionActionMode = null;
9375        }
9376    }
9377
9378    private class PastePopupWindow implements OnClickListener {
9379        private final PopupWindow mContainer;
9380        private final View[] mPasteViews = new View[4];
9381        private final int[] mPasteViewLayouts = new int[] {
9382                mTextEditPasteWindowLayout,  mTextEditNoPasteWindowLayout,
9383                mTextEditSidePasteWindowLayout, mTextEditSideNoPasteWindowLayout };
9384
9385        public PastePopupWindow() {
9386            mContainer = new PopupWindow(TextView.this.mContext, null,
9387                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9388            mContainer.setSplitTouchEnabled(true);
9389            mContainer.setClippingEnabled(false);
9390            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9391
9392            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9393            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9394        }
9395
9396        private int viewIndex(boolean onTop) {
9397            return (onTop ? 0 : 1<<1) + (canPaste() ? 0 : 1<<0);
9398        }
9399
9400        private void updateContent(boolean onTop) {
9401            final int viewIndex = viewIndex(onTop);
9402            View view = mPasteViews[viewIndex];
9403
9404            if (view == null) {
9405                final int layout = mPasteViewLayouts[viewIndex];
9406                LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
9407                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9408                if (inflater != null) {
9409                    view = inflater.inflate(layout, null);
9410                }
9411
9412                if (view == null) {
9413                    throw new IllegalArgumentException("Unable to inflate TextEdit paste window");
9414                }
9415
9416                final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9417                view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9418                        ViewGroup.LayoutParams.WRAP_CONTENT));
9419                view.measure(size, size);
9420
9421                view.setOnClickListener(this);
9422
9423                mPasteViews[viewIndex] = view;
9424            }
9425
9426            mContainer.setContentView(view);
9427        }
9428
9429        public void show() {
9430            updateContent(true);
9431            positionAtCursor();
9432        }
9433
9434        public void hide() {
9435            mContainer.dismiss();
9436        }
9437
9438        public boolean isShowing() {
9439            return mContainer.isShowing();
9440        }
9441
9442        @Override
9443        public void onClick(View v) {
9444            if (canPaste()) {
9445                paste(getSelectionStart(), getSelectionEnd());
9446            }
9447            hide();
9448        }
9449
9450        void positionAtCursor() {
9451            View contentView = mContainer.getContentView();
9452            int width = contentView.getMeasuredWidth();
9453            int height = contentView.getMeasuredHeight();
9454            final int offset = TextView.this.getSelectionStart();
9455            final int line = mLayout.getLineForOffset(offset);
9456            final int lineTop = mLayout.getLineTop(line);
9457            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
9458
9459            final Rect bounds = sCursorControllerTempRect;
9460            bounds.left = (int) (primaryHorizontal - width / 2.0f);
9461            bounds.top = lineTop - height;
9462
9463            bounds.right = bounds.left + width;
9464            bounds.bottom = bounds.top + height;
9465
9466            convertFromViewportToContentCoordinates(bounds);
9467
9468            final int[] coords = mTempCoords;
9469            TextView.this.getLocationInWindow(coords);
9470            coords[0] += bounds.left;
9471            coords[1] += bounds.top;
9472
9473            final int screenWidth = mContext.getResources().getDisplayMetrics().widthPixels;
9474            if (coords[1] < 0) {
9475                updateContent(false);
9476                // Update dimensions from new view
9477                contentView = mContainer.getContentView();
9478                width = contentView.getMeasuredWidth();
9479                height = contentView.getMeasuredHeight();
9480
9481                // Vertical clipping, move under edited line and to the side of insertion cursor
9482                // TODO bottom clipping in case there is no system bar
9483                coords[1] += height;
9484                final int lineBottom = mLayout.getLineBottom(line);
9485                final int lineHeight = lineBottom - lineTop;
9486                coords[1] += lineHeight;
9487
9488                // Move to right hand side of insertion cursor by default. TODO RTL text.
9489                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
9490                final int handleHalfWidth = handle.getIntrinsicWidth() / 2;
9491
9492                if (primaryHorizontal + handleHalfWidth + width < screenWidth) {
9493                    coords[0] += handleHalfWidth + width / 2;
9494                } else {
9495                    coords[0] -= handleHalfWidth + width / 2;
9496                }
9497            } else {
9498                // Horizontal clipping
9499                coords[0] = Math.max(0, coords[0]);
9500                coords[0] = Math.min(screenWidth - width, coords[0]);
9501            }
9502
9503            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
9504        }
9505    }
9506
9507    private abstract class HandleView extends View implements ViewTreeObserver.OnPreDrawListener {
9508        protected Drawable mDrawable;
9509        private final PopupWindow mContainer;
9510        // Position with respect to the parent TextView
9511        private int mPositionX, mPositionY;
9512        private boolean mIsDragging;
9513        // Offset from touch position to mPosition
9514        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
9515        protected float mHotspotX;
9516        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
9517        private float mTouchOffsetY;
9518        // Where the touch position should be on the handle to ensure a maximum cursor visibility
9519        private float mIdealVerticalOffset;
9520        // Parent's (TextView) previous position in window
9521        private int mLastParentX, mLastParentY;
9522        // PopupWindow container absolute position with respect to the enclosing window
9523        private int mContainerPositionX, mContainerPositionY;
9524        // Visible or not (scrolled off screen), whether or not this handle should be visible
9525        private boolean mIsActive = false;
9526        // Used to detect that setFrame was called
9527        private boolean mNeedsUpdate = true;
9528
9529        public HandleView() {
9530            super(TextView.this.mContext);
9531            mContainer = new PopupWindow(TextView.this.mContext, null,
9532                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9533            mContainer.setSplitTouchEnabled(true);
9534            mContainer.setClippingEnabled(false);
9535            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9536            mContainer.setContentView(this);
9537
9538            initDrawable();
9539
9540            final int handleHeight = mDrawable.getIntrinsicHeight();
9541            mTouchOffsetY = -0.3f * handleHeight;
9542            mIdealVerticalOffset = 0.7f * handleHeight;
9543        }
9544
9545        @Override
9546        protected boolean setFrame(int left, int top, int right, int bottom) {
9547            boolean changed = super.setFrame(left, top, right, bottom);
9548            // onPreDraw is called for PhoneWindow before the layout of this view is
9549            // performed. Make sure to update position, even if container didn't move.
9550            if (changed) mNeedsUpdate  = true;
9551            return changed;
9552        }
9553
9554        protected abstract void initDrawable();
9555
9556        // Touch-up filter: number of previous positions remembered
9557        private static final int HISTORY_SIZE = 5;
9558        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
9559        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
9560        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
9561        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
9562        private int mPreviousOffsetIndex = 0;
9563        private int mNumberPreviousOffsets = 0;
9564
9565        private void startTouchUpFilter(int offset) {
9566            mNumberPreviousOffsets = 0;
9567            addPositionToTouchUpFilter(offset);
9568        }
9569
9570        private void addPositionToTouchUpFilter(int offset) {
9571            if (mNumberPreviousOffsets > 0 &&
9572                    mPreviousOffsets[mPreviousOffsetIndex] == offset) {
9573                // Make sure only actual changes of position are recorded.
9574                return;
9575            }
9576
9577            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
9578            mPreviousOffsets[mPreviousOffsetIndex] = offset;
9579            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
9580            mNumberPreviousOffsets++;
9581        }
9582
9583        private void filterOnTouchUp() {
9584            final long now = SystemClock.uptimeMillis();
9585            int i = 0;
9586            int index = mPreviousOffsetIndex;
9587            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
9588            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
9589                i++;
9590                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
9591            }
9592
9593            if (i > 0 && i < iMax &&
9594                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
9595                updateOffset(mPreviousOffsets[index]);
9596            }
9597        }
9598
9599        @Override
9600        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
9601            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
9602        }
9603
9604        public void show() {
9605            if (isShowing()) {
9606                mContainer.update(mContainerPositionX, mContainerPositionY,
9607                        mRight - mLeft, mBottom - mTop);
9608            } else {
9609                mContainer.showAtLocation(TextView.this, 0,
9610                        mContainerPositionX, mContainerPositionY);
9611
9612                mIsActive = true;
9613
9614                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9615                vto.addOnPreDrawListener(this);
9616            }
9617        }
9618
9619        protected void dismiss() {
9620            mIsDragging = false;
9621            mContainer.dismiss();
9622        }
9623
9624        public void hide() {
9625            dismiss();
9626
9627            mIsActive = false;
9628
9629            ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9630            vto.removeOnPreDrawListener(this);
9631        }
9632
9633        public boolean isShowing() {
9634            return mContainer.isShowing();
9635        }
9636
9637        private boolean isPositionVisible() {
9638            // Always show a dragging handle.
9639            if (mIsDragging) {
9640                return true;
9641            }
9642
9643            if (isInBatchEditMode()) {
9644                return false;
9645            }
9646
9647            final int extendedPaddingTop = getExtendedPaddingTop();
9648            final int extendedPaddingBottom = getExtendedPaddingBottom();
9649            final int compoundPaddingLeft = getCompoundPaddingLeft();
9650            final int compoundPaddingRight = getCompoundPaddingRight();
9651
9652            final TextView textView = TextView.this;
9653
9654            if (mTempRect == null) mTempRect = new Rect();
9655            final Rect clip = mTempRect;
9656            clip.left = compoundPaddingLeft;
9657            clip.top = extendedPaddingTop;
9658            clip.right = textView.getWidth() - compoundPaddingRight;
9659            clip.bottom = textView.getHeight() - extendedPaddingBottom;
9660
9661            final ViewParent parent = textView.getParent();
9662            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
9663                return false;
9664            }
9665
9666            final int[] coords = mTempCoords;
9667            textView.getLocationInWindow(coords);
9668            final int posX = coords[0] + mPositionX + (int) mHotspotX;
9669            final int posY = coords[1] + mPositionY;
9670
9671            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
9672            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
9673                    posY >= clip.top && posY <= clip.bottom;
9674        }
9675
9676        public abstract int getCurrentCursorOffset();
9677
9678        public abstract void updateOffset(int offset);
9679
9680        public abstract void updatePosition(float x, float y);
9681
9682        protected void positionAtCursorOffset(int offset) {
9683            // A HandleView relies on the layout, which may be nulled by external methods.
9684            if (mLayout == null) {
9685                // Will update controllers' state, hiding them and stopping selection mode if needed
9686                prepareCursorControllers();
9687                return;
9688            }
9689
9690            addPositionToTouchUpFilter(offset);
9691            final int line = mLayout.getLineForOffset(offset);
9692            final int lineBottom = mLayout.getLineBottom(line);
9693
9694            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
9695            mPositionY = lineBottom;
9696
9697            // Take TextView's padding into account.
9698            mPositionX += viewportToContentHorizontalOffset();
9699            mPositionY += viewportToContentVerticalOffset();
9700        }
9701
9702        private void checkForContainerPositionChange() {
9703            positionAtCursorOffset(getCurrentCursorOffset());
9704
9705            final int previousContainerPositionX = mContainerPositionX;
9706            final int previousContainerPositionY = mContainerPositionY;
9707
9708            TextView.this.getLocationInWindow(mTempCoords);
9709            mContainerPositionX = mTempCoords[0] + mPositionX;
9710            mContainerPositionY = mTempCoords[1] + mPositionY;
9711
9712            mNeedsUpdate |= previousContainerPositionX != mContainerPositionX;
9713            mNeedsUpdate |= previousContainerPositionY != mContainerPositionY;
9714        }
9715
9716        public boolean onPreDraw() {
9717            checkForContainerPositionChange();
9718            if (mNeedsUpdate) {
9719                if (mIsDragging) {
9720                    if (mTempCoords[0] != mLastParentX || mTempCoords[1] != mLastParentY) {
9721                        mTouchToWindowOffsetX += mTempCoords[0] - mLastParentX;
9722                        mTouchToWindowOffsetY += mTempCoords[1] - mLastParentY;
9723                        mLastParentX = mTempCoords[0];
9724                        mLastParentY = mTempCoords[1];
9725                    }
9726                }
9727
9728                onHandleMoved();
9729
9730                if (isPositionVisible()) {
9731                    mContainer.update(mContainerPositionX, mContainerPositionY,
9732                            mRight - mLeft, mBottom - mTop);
9733
9734                    if (mIsActive && !isShowing()) {
9735                        show();
9736                    }
9737                } else {
9738                    if (isShowing()) {
9739                        dismiss();
9740                    }
9741                }
9742                mNeedsUpdate = false;
9743            }
9744            return true;
9745        }
9746
9747        @Override
9748        protected void onDraw(Canvas c) {
9749            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
9750            mDrawable.draw(c);
9751        }
9752
9753        @Override
9754        public boolean onTouchEvent(MotionEvent ev) {
9755            switch (ev.getActionMasked()) {
9756                case MotionEvent.ACTION_DOWN: {
9757                    startTouchUpFilter(getCurrentCursorOffset());
9758                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
9759                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
9760
9761                    final int[] coords = mTempCoords;
9762                    TextView.this.getLocationInWindow(coords);
9763                    mLastParentX = coords[0];
9764                    mLastParentY = coords[1];
9765                    mIsDragging = true;
9766                    break;
9767                }
9768
9769                case MotionEvent.ACTION_MOVE: {
9770                    final float rawX = ev.getRawX();
9771                    final float rawY = ev.getRawY();
9772
9773                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
9774                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
9775                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
9776                    float newVerticalOffset;
9777                    if (previousVerticalOffset < mIdealVerticalOffset) {
9778                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
9779                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
9780                    } else {
9781                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
9782                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
9783                    }
9784                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
9785
9786                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
9787                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
9788
9789                    updatePosition(newPosX, newPosY);
9790                    break;
9791                }
9792
9793                case MotionEvent.ACTION_UP:
9794                    filterOnTouchUp();
9795                    mIsDragging = false;
9796                    break;
9797
9798                case MotionEvent.ACTION_CANCEL:
9799                    mIsDragging = false;
9800                    break;
9801            }
9802            return true;
9803        }
9804
9805        public boolean isDragging() {
9806            return mIsDragging;
9807        }
9808
9809        void onHandleMoved() {
9810            // Does nothing by default
9811        }
9812
9813        public void onDetached() {
9814            // Should be overriden to clean possible Runnable
9815        }
9816    }
9817
9818    private class InsertionHandleView extends HandleView {
9819        private static final int DELAY_BEFORE_FADE_OUT = 4000;
9820        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
9821
9822        // Used to detect taps on the insertion handle, which will affect the PastePopupWindow
9823        private float mDownPositionX, mDownPositionY;
9824        private PastePopupWindow mPastePopupWindow;
9825        private Runnable mHider;
9826        private Runnable mPastePopupShower;
9827
9828        @Override
9829        public void show() {
9830            super.show();
9831            hideDelayed();
9832            hidePastePopupWindow();
9833        }
9834
9835        public void show(int delayBeforePaste) {
9836            show();
9837
9838            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
9839            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
9840                delayBeforePaste = 0;
9841            }
9842            if (delayBeforePaste == 0 || canPaste()) {
9843                if (mPastePopupShower == null) {
9844                    mPastePopupShower = new Runnable() {
9845                        public void run() {
9846                            showPastePopupWindow();
9847                        }
9848                    };
9849                }
9850                TextView.this.postDelayed(mPastePopupShower, delayBeforePaste);
9851            }
9852        }
9853
9854        @Override
9855        protected void dismiss() {
9856            super.dismiss();
9857            onDetached();
9858        }
9859
9860        private void hideDelayed() {
9861            removeHiderCallback();
9862            if (mHider == null) {
9863                mHider = new Runnable() {
9864                    public void run() {
9865                        hide();
9866                    }
9867                };
9868            }
9869            TextView.this.postDelayed(mHider, DELAY_BEFORE_FADE_OUT);
9870        }
9871
9872        private void removeHiderCallback() {
9873            if (mHider != null) {
9874                TextView.this.removeCallbacks(mHider);
9875            }
9876        }
9877
9878        @Override
9879        protected void initDrawable() {
9880            if (mSelectHandleCenter == null) {
9881                mSelectHandleCenter = mContext.getResources().getDrawable(
9882                        mTextSelectHandleRes);
9883            }
9884            mDrawable = mSelectHandleCenter;
9885            mHotspotX = mDrawable.getIntrinsicWidth() / 2.0f;
9886        }
9887
9888        @Override
9889        public boolean onTouchEvent(MotionEvent ev) {
9890            final boolean result = super.onTouchEvent(ev);
9891
9892            switch (ev.getActionMasked()) {
9893                case MotionEvent.ACTION_DOWN:
9894                    mDownPositionX = ev.getRawX();
9895                    mDownPositionY = ev.getRawY();
9896                    break;
9897
9898                case MotionEvent.ACTION_UP:
9899                    final float deltaX = mDownPositionX - ev.getRawX();
9900                    final float deltaY = mDownPositionY - ev.getRawY();
9901                    final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
9902                    if (distanceSquared < mSquaredTouchSlopDistance) {
9903                        if (mPastePopupWindow != null && mPastePopupWindow.isShowing()) {
9904                            // Tapping on the handle dismisses the displayed paste view,
9905                            mPastePopupWindow.hide();
9906                        } else {
9907                            show(0);
9908                        }
9909                    }
9910                    hideDelayed();
9911                    break;
9912
9913                case MotionEvent.ACTION_CANCEL:
9914                    hideDelayed();
9915                    break;
9916
9917                default:
9918                    break;
9919            }
9920
9921            return result;
9922        }
9923
9924        @Override
9925        public int getCurrentCursorOffset() {
9926            return TextView.this.getSelectionStart();
9927        }
9928
9929        @Override
9930        public void updateOffset(int offset) {
9931            Selection.setSelection((Spannable) mText, offset);
9932        }
9933
9934        @Override
9935        public void updatePosition(float x, float y) {
9936            updateOffset(getOffsetForPosition(x, y));
9937        }
9938
9939        void showPastePopupWindow() {
9940            if (mPastePopupWindow == null) {
9941                mPastePopupWindow = new PastePopupWindow();
9942            }
9943            mPastePopupWindow.show();
9944        }
9945
9946        @Override
9947        void onHandleMoved() {
9948            removeHiderCallback();
9949            hidePastePopupWindow();
9950        }
9951
9952        void hidePastePopupWindow() {
9953            if (mPastePopupShower != null) {
9954                TextView.this.removeCallbacks(mPastePopupShower);
9955            }
9956            if (mPastePopupWindow != null) {
9957                mPastePopupWindow.hide();
9958            }
9959        }
9960
9961        @Override
9962        public void onDetached() {
9963            removeHiderCallback();
9964            hidePastePopupWindow();
9965        }
9966    }
9967
9968    private class SelectionStartHandleView extends HandleView {
9969        @Override
9970        protected void initDrawable() {
9971            if (mSelectHandleLeft == null) {
9972                mSelectHandleLeft = mContext.getResources().getDrawable(
9973                        mTextSelectHandleLeftRes);
9974            }
9975            mDrawable = mSelectHandleLeft;
9976            mHotspotX = mDrawable.getIntrinsicWidth() * 3.0f / 4.0f;
9977        }
9978
9979        @Override
9980        public int getCurrentCursorOffset() {
9981            return TextView.this.getSelectionStart();
9982        }
9983
9984        @Override
9985        public void updateOffset(int offset) {
9986            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
9987        }
9988
9989        @Override
9990        public void updatePosition(float x, float y) {
9991            final int selectionStart = getSelectionStart();
9992            final int selectionEnd = getSelectionEnd();
9993
9994            int offset = getOffsetForPosition(x, y);
9995
9996            // No need to redraw when the offset is unchanged
9997            if (offset == selectionStart) return;
9998            // Handles can not cross and selection is at least one character
9999            if (offset >= selectionEnd) offset = selectionEnd - 1;
10000
10001            Selection.setSelection((Spannable) mText, offset, selectionEnd);
10002        }
10003    }
10004
10005    private class SelectionEndHandleView extends HandleView {
10006        @Override
10007        protected void initDrawable() {
10008            if (mSelectHandleRight == null) {
10009                mSelectHandleRight = mContext.getResources().getDrawable(
10010                        mTextSelectHandleRightRes);
10011            }
10012            mDrawable = mSelectHandleRight;
10013            mHotspotX = mDrawable.getIntrinsicWidth() / 4.0f;
10014        }
10015
10016        @Override
10017        public int getCurrentCursorOffset() {
10018            return TextView.this.getSelectionEnd();
10019        }
10020
10021        @Override
10022        public void updateOffset(int offset) {
10023            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10024        }
10025
10026        @Override
10027        public void updatePosition(float x, float y) {
10028            final int selectionStart = getSelectionStart();
10029            final int selectionEnd = getSelectionEnd();
10030
10031            int offset = getOffsetForPosition(x, y);
10032
10033            // No need to redraw when the offset is unchanged
10034            if (offset == selectionEnd) return;
10035            // Handles can not cross and selection is at least one character
10036            if (offset <= selectionStart) offset = selectionStart + 1;
10037
10038            Selection.setSelection((Spannable) mText, selectionStart, offset);
10039        }
10040    }
10041
10042    /**
10043     * A CursorController instance can be used to control a cursor in the text.
10044     * It is not used outside of {@link TextView}.
10045     * @hide
10046     */
10047    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10048        /**
10049         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10050         * See also {@link #hide()}.
10051         */
10052        public void show();
10053
10054        /**
10055         * Hide the cursor controller from screen.
10056         * See also {@link #show()}.
10057         */
10058        public void hide();
10059
10060        /**
10061         * Called when the view is detached from window. Perform house keeping task, such as
10062         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10063         * preventing the activity from being recycled.
10064         */
10065        public void onDetached();
10066    }
10067
10068    private class InsertionPointCursorController implements CursorController {
10069        private static final int DELAY_BEFORE_PASTE = 2000;
10070
10071        private InsertionHandleView mHandle;
10072
10073        public void show() {
10074            ((InsertionHandleView) getHandle()).show(DELAY_BEFORE_PASTE);
10075        }
10076
10077        public void showWithPaste() {
10078            ((InsertionHandleView) getHandle()).show(0);
10079        }
10080
10081        public void hide() {
10082            if (mHandle != null) {
10083                mHandle.hide();
10084            }
10085        }
10086
10087        public void onTouchModeChanged(boolean isInTouchMode) {
10088            if (!isInTouchMode) {
10089                hide();
10090            }
10091        }
10092
10093        private HandleView getHandle() {
10094            if (mHandle == null) {
10095                mHandle = new InsertionHandleView();
10096            }
10097            return mHandle;
10098        }
10099
10100        @Override
10101        public void onDetached() {
10102            final ViewTreeObserver observer = getViewTreeObserver();
10103            observer.removeOnTouchModeChangeListener(this);
10104
10105            if (mHandle != null) mHandle.onDetached();
10106        }
10107    }
10108
10109    private class SelectionModifierCursorController implements CursorController {
10110        // The cursor controller handles, lazily created when shown.
10111        private SelectionStartHandleView mStartHandle;
10112        private SelectionEndHandleView mEndHandle;
10113        // The offsets of that last touch down event. Remembered to start selection there.
10114        private int mMinTouchOffset, mMaxTouchOffset;
10115
10116        // Double tap detection
10117        private long mPreviousTapUpTime = 0;
10118        private float mPreviousTapPositionX, mPreviousTapPositionY;
10119
10120        SelectionModifierCursorController() {
10121            resetTouchOffsets();
10122        }
10123
10124        public void show() {
10125            if (isInBatchEditMode()) {
10126                return;
10127            }
10128
10129            // Lazy object creation has to be done before updatePosition() is called.
10130            if (mStartHandle == null) mStartHandle = new SelectionStartHandleView();
10131            if (mEndHandle == null) mEndHandle = new SelectionEndHandleView();
10132
10133            mStartHandle.show();
10134            mEndHandle.show();
10135
10136            hideInsertionPointCursorController();
10137            hideSuggestions();
10138        }
10139
10140        public void hide() {
10141            if (mStartHandle != null) mStartHandle.hide();
10142            if (mEndHandle != null) mEndHandle.hide();
10143        }
10144
10145        public void onTouchEvent(MotionEvent event) {
10146            // This is done even when the View does not have focus, so that long presses can start
10147            // selection and tap can move cursor from this tap position.
10148            switch (event.getActionMasked()) {
10149                case MotionEvent.ACTION_DOWN:
10150                    final float x = event.getX();
10151                    final float y = event.getY();
10152
10153                    // Remember finger down position, to be able to start selection from there
10154                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
10155
10156                    // Double tap detection
10157                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
10158                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
10159                            isPositionOnText(x, y)) {
10160                        final float deltaX = x - mPreviousTapPositionX;
10161                        final float deltaY = y - mPreviousTapPositionY;
10162                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10163                        if (distanceSquared < mSquaredTouchSlopDistance) {
10164                            showSuggestions();
10165                            mDiscardNextActionUp = true;
10166                        }
10167                    }
10168
10169                    mPreviousTapPositionX = x;
10170                    mPreviousTapPositionY = y;
10171
10172                    break;
10173
10174                case MotionEvent.ACTION_POINTER_DOWN:
10175                case MotionEvent.ACTION_POINTER_UP:
10176                    // Handle multi-point gestures. Keep min and max offset positions.
10177                    // Only activated for devices that correctly handle multi-touch.
10178                    if (mContext.getPackageManager().hasSystemFeature(
10179                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
10180                        updateMinAndMaxOffsets(event);
10181                    }
10182                    break;
10183
10184                case MotionEvent.ACTION_UP:
10185                    mPreviousTapUpTime = SystemClock.uptimeMillis();
10186                    break;
10187            }
10188        }
10189
10190        /**
10191         * @param event
10192         */
10193        private void updateMinAndMaxOffsets(MotionEvent event) {
10194            int pointerCount = event.getPointerCount();
10195            for (int index = 0; index < pointerCount; index++) {
10196                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
10197                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
10198                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
10199            }
10200        }
10201
10202        public int getMinTouchOffset() {
10203            return mMinTouchOffset;
10204        }
10205
10206        public int getMaxTouchOffset() {
10207            return mMaxTouchOffset;
10208        }
10209
10210        public void resetTouchOffsets() {
10211            mMinTouchOffset = mMaxTouchOffset = -1;
10212        }
10213
10214        /**
10215         * @return true iff this controller is currently used to move the selection start.
10216         */
10217        public boolean isSelectionStartDragged() {
10218            return mStartHandle != null && mStartHandle.isDragging();
10219        }
10220
10221        public void onTouchModeChanged(boolean isInTouchMode) {
10222            if (!isInTouchMode) {
10223                hide();
10224            }
10225        }
10226
10227        @Override
10228        public void onDetached() {
10229            final ViewTreeObserver observer = getViewTreeObserver();
10230            observer.removeOnTouchModeChangeListener(this);
10231
10232            if (mStartHandle != null) mStartHandle.onDetached();
10233            if (mEndHandle != null) mEndHandle.onDetached();
10234        }
10235    }
10236
10237    private void hideInsertionPointCursorController() {
10238        // No need to create the controller to hide it.
10239        if (mInsertionPointCursorController != null) {
10240            mInsertionPointCursorController.hide();
10241        }
10242    }
10243
10244    /**
10245     * Hides the insertion controller and stops text selection mode, hiding the selection controller
10246     */
10247    private void hideControllers() {
10248        hideInsertionPointCursorController();
10249        stopSelectionActionMode();
10250        hideSuggestions();
10251    }
10252
10253    /**
10254     * Get the character offset closest to the specified absolute position. A typical use case is to
10255     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
10256     *
10257     * @param x The horizontal absolute position of a point on screen
10258     * @param y The vertical absolute position of a point on screen
10259     * @return the character offset for the character whose position is closest to the specified
10260     *  position. Returns -1 if there is no layout.
10261     */
10262    public int getOffsetForPosition(float x, float y) {
10263        if (getLayout() == null) return -1;
10264        final int line = getLineAtCoordinate(y);
10265        final int offset = getOffsetAtCoordinate(line, x);
10266        return offset;
10267    }
10268
10269    private float convertToLocalHorizontalCoordinate(float x) {
10270        x -= getTotalPaddingLeft();
10271        // Clamp the position to inside of the view.
10272        x = Math.max(0.0f, x);
10273        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
10274        x += getScrollX();
10275        return x;
10276    }
10277
10278    private int getLineAtCoordinate(float y) {
10279        y -= getTotalPaddingTop();
10280        // Clamp the position to inside of the view.
10281        y = Math.max(0.0f, y);
10282        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
10283        y += getScrollY();
10284        return getLayout().getLineForVertical((int) y);
10285    }
10286
10287    private int getOffsetAtCoordinate(int line, float x) {
10288        x = convertToLocalHorizontalCoordinate(x);
10289        return getLayout().getOffsetForHorizontal(line, x);
10290    }
10291
10292    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
10293     * in the view. Returns false when the position is in the empty space of left/right of text.
10294     */
10295    private boolean isPositionOnText(float x, float y) {
10296        if (getLayout() == null) return false;
10297
10298        final int line = getLineAtCoordinate(y);
10299        x = convertToLocalHorizontalCoordinate(x);
10300
10301        if (x < getLayout().getLineLeft(line)) return false;
10302        if (x > getLayout().getLineRight(line)) return false;
10303        return true;
10304    }
10305
10306    @Override
10307    public boolean onDragEvent(DragEvent event) {
10308        switch (event.getAction()) {
10309            case DragEvent.ACTION_DRAG_STARTED:
10310                return hasInsertionController();
10311
10312            case DragEvent.ACTION_DRAG_ENTERED:
10313                TextView.this.requestFocus();
10314                return true;
10315
10316            case DragEvent.ACTION_DRAG_LOCATION:
10317                final int offset = getOffsetForPosition(event.getX(), event.getY());
10318                Selection.setSelection((Spannable)mText, offset);
10319                return true;
10320
10321            case DragEvent.ACTION_DROP:
10322                onDrop(event);
10323                return true;
10324
10325            case DragEvent.ACTION_DRAG_ENDED:
10326            case DragEvent.ACTION_DRAG_EXITED:
10327            default:
10328                return true;
10329        }
10330    }
10331
10332    private void onDrop(DragEvent event) {
10333        StringBuilder content = new StringBuilder("");
10334        ClipData clipData = event.getClipData();
10335        final int itemCount = clipData.getItemCount();
10336        for (int i=0; i < itemCount; i++) {
10337            Item item = clipData.getItemAt(i);
10338            content.append(item.coerceToText(TextView.this.mContext));
10339        }
10340
10341        final int offset = getOffsetForPosition(event.getX(), event.getY());
10342
10343        Object localState = event.getLocalState();
10344        DragLocalState dragLocalState = null;
10345        if (localState instanceof DragLocalState) {
10346            dragLocalState = (DragLocalState) localState;
10347        }
10348        boolean dragDropIntoItself = dragLocalState != null &&
10349                dragLocalState.sourceTextView == this;
10350
10351        if (dragDropIntoItself) {
10352            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
10353                // A drop inside the original selection discards the drop.
10354                return;
10355            }
10356        }
10357
10358        final int originalLength = mText.length();
10359        long minMax = prepareSpacesAroundPaste(offset, offset, content);
10360        int min = extractRangeStartFromLong(minMax);
10361        int max = extractRangeEndFromLong(minMax);
10362
10363        Selection.setSelection((Spannable) mText, max);
10364        ((Editable) mText).replace(min, max, content);
10365
10366        if (dragDropIntoItself) {
10367            int dragSourceStart = dragLocalState.start;
10368            int dragSourceEnd = dragLocalState.end;
10369            if (max <= dragSourceStart) {
10370                // Inserting text before selection has shifted positions
10371                final int shift = mText.length() - originalLength;
10372                dragSourceStart += shift;
10373                dragSourceEnd += shift;
10374            }
10375
10376            // Delete original selection
10377            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
10378
10379            // Make sure we do not leave two adjacent spaces.
10380            if ((dragSourceStart == 0 ||
10381                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
10382                    (dragSourceStart == mText.length() ||
10383                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
10384                final int pos = dragSourceStart == mText.length() ?
10385                        dragSourceStart - 1 : dragSourceStart;
10386                ((Editable) mText).delete(pos, pos + 1);
10387            }
10388        }
10389    }
10390
10391    /**
10392     * @return True if this view supports insertion handles.
10393     */
10394    boolean hasInsertionController() {
10395        return mInsertionControllerEnabled;
10396    }
10397
10398    /**
10399     * @return True if this view supports selection handles.
10400     */
10401    boolean hasSelectionController() {
10402        return mSelectionControllerEnabled;
10403    }
10404
10405    InsertionPointCursorController getInsertionController() {
10406        if (!mInsertionControllerEnabled) {
10407            return null;
10408        }
10409
10410        if (mInsertionPointCursorController == null) {
10411            mInsertionPointCursorController = new InsertionPointCursorController();
10412
10413            final ViewTreeObserver observer = getViewTreeObserver();
10414            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
10415        }
10416
10417        return mInsertionPointCursorController;
10418    }
10419
10420    SelectionModifierCursorController getSelectionController() {
10421        if (!mSelectionControllerEnabled) {
10422            return null;
10423        }
10424
10425        if (mSelectionModifierCursorController == null) {
10426            mSelectionModifierCursorController = new SelectionModifierCursorController();
10427
10428            final ViewTreeObserver observer = getViewTreeObserver();
10429            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
10430        }
10431
10432        return mSelectionModifierCursorController;
10433    }
10434
10435    boolean isInBatchEditMode() {
10436        final InputMethodState ims = mInputMethodState;
10437        if (ims != null) {
10438            return ims.mBatchEditNesting > 0;
10439        }
10440        return mInBatchEditControllers;
10441    }
10442
10443    /**
10444     * Resolve the text direction.
10445     *
10446     * Text direction of paragraphs in a TextView is determined using a heuristic. If the correct
10447     * text direction cannot be determined by the heuristic, the view’s resolved layout direction
10448     * determines the direction.
10449     *
10450     * This heuristic and result is applied individually to each paragraph in a TextView, based on
10451     * the text and style content of that paragraph. Paragraph text styles can also be used to force
10452     * a particular direction.
10453     */
10454    @Override
10455    protected void resolveTextDirection() {
10456        int resolvedTextDirection = TEXT_DIRECTION_UNDEFINED;
10457        switch(mTextDirection) {
10458            default:
10459            case TEXT_DIRECTION_INHERIT:
10460                // Try to the text direction from the parent layout. If not possible, then we will
10461                // use the default layout direction to decide later
10462                if (mParent != null && mParent instanceof ViewGroup) {
10463                    resolvedTextDirection = ((ViewGroup) mParent).getResolvedTextDirection();
10464                }
10465                break;
10466            case TEXT_DIRECTION_FIRST_STRONG:
10467                resolvedTextDirection = getTextDirectionFromFirstStrong(mText);
10468                break;
10469            case TEXT_DIRECTION_ANY_RTL:
10470                resolvedTextDirection = getTextDirectionFromAnyRtl(mText);
10471                break;
10472            case TEXT_DIRECTION_CHAR_COUNT:
10473                resolvedTextDirection = getTextDirectionFromCharCount(mText);
10474                break;
10475            case TEXT_DIRECTION_LTR:
10476                resolvedTextDirection = TEXT_DIRECTION_LTR;
10477                break;
10478            case TEXT_DIRECTION_RTL:
10479                resolvedTextDirection = TEXT_DIRECTION_RTL;
10480                break;
10481        }
10482        // if we have been so far unable to get the text direction from the heuristics, then we are
10483        // falling back using the layout direction
10484        if (resolvedTextDirection == TEXT_DIRECTION_UNDEFINED) {
10485            switch(getResolvedLayoutDirection()) {
10486                default:
10487                case LAYOUT_DIRECTION_LTR:
10488                    resolvedTextDirection = TEXT_DIRECTION_LTR;
10489                    break;
10490                case LAYOUT_DIRECTION_RTL:
10491                    resolvedTextDirection = TEXT_DIRECTION_RTL;
10492                    break;
10493            }
10494        }
10495        mResolvedTextDirection = resolvedTextDirection;
10496    }
10497
10498    /**
10499     * Get text direction following the "first strong" heuristic.
10500     *
10501     * @param cs the CharSequence used to get the text direction.
10502     *
10503     * @return {@link #TEXT_DIRECTION_RTL} if direction it RTL, {@link #TEXT_DIRECTION_LTR} if
10504     * direction it LTR or {@link #TEXT_DIRECTION_UNDEFINED} if direction cannot be found.
10505     */
10506    private static int getTextDirectionFromFirstStrong(final CharSequence cs) {
10507        final int length = cs.length();
10508        if (length == 0) {
10509            return TEXT_DIRECTION_UNDEFINED;
10510        }
10511        for(int i = 0; i < length; i++) {
10512            final char c = cs.charAt(i);
10513            final byte dir = Character.getDirectionality(c);
10514            if (isStrongLtrChar(dir)) {
10515                return TEXT_DIRECTION_LTR;
10516            } else if (isStrongRtlChar(dir)) {
10517                return TEXT_DIRECTION_RTL;
10518            }
10519        }
10520        return TEXT_DIRECTION_UNDEFINED;
10521    }
10522
10523    /**
10524     * Get text direction following the "any RTL" heuristic.
10525     *
10526     * @param cs the CharSequence used to get the text direction.
10527     *
10528     * @return {@link #TEXT_DIRECTION_RTL} if direction it RTL, {@link #TEXT_DIRECTION_LTR} if
10529     * direction it LTR or {@link #TEXT_DIRECTION_UNDEFINED} if direction cannot be found.
10530     */
10531    private static int getTextDirectionFromAnyRtl(final CharSequence cs) {
10532        final int length = cs.length();
10533        if (length == 0) {
10534            return TEXT_DIRECTION_UNDEFINED;
10535        }
10536        boolean foundStrongLtr = false;
10537        boolean foundStrongRtl = false;
10538        for(int i = 0; i < length; i++) {
10539            final char c = cs.charAt(i);
10540            final byte dir = Character.getDirectionality(c);
10541            if (isStrongLtrChar(dir)) {
10542                foundStrongLtr = true;
10543            } else if (isStrongRtlChar(dir)) {
10544                foundStrongRtl = true;
10545                break;
10546            }
10547        }
10548        if (foundStrongRtl) {
10549            return TEXT_DIRECTION_RTL;
10550        }
10551        if (foundStrongLtr) {
10552            return TEXT_DIRECTION_LTR;
10553        }
10554        return TEXT_DIRECTION_UNDEFINED;
10555    }
10556
10557    /**
10558     * Get text direction following the "char count" heuristic.
10559     *
10560     * @param cs the CharSequence used to get the text direction.
10561     *
10562     * @return {@link #TEXT_DIRECTION_RTL} if direction it RTL, {@link #TEXT_DIRECTION_LTR} if
10563     * direction it LTR or {@link #TEXT_DIRECTION_UNDEFINED} if direction cannot be found.
10564     */
10565    private int getTextDirectionFromCharCount(CharSequence cs) {
10566        final int length = cs.length();
10567        if (length == 0) {
10568            return TEXT_DIRECTION_UNDEFINED;
10569        }
10570        int countLtr = 0;
10571        int countRtl = 0;
10572        for(int i = 0; i < length; i++) {
10573            final char c = cs.charAt(i);
10574            final byte dir = Character.getDirectionality(c);
10575            if (isStrongLtrChar(dir)) {
10576                countLtr++;
10577            } else if (isStrongRtlChar(dir)) {
10578                countRtl++;
10579            }
10580        }
10581        final float percentLtr = ((float) countLtr) / (countLtr + countRtl);
10582        if (percentLtr > DEFAULT_TEXT_DIRECTION_CHAR_COUNT_THRESHOLD) {
10583            return TEXT_DIRECTION_LTR;
10584        }
10585        final float percentRtl = ((float) countRtl) / (countLtr + countRtl);
10586        if (percentRtl > DEFAULT_TEXT_DIRECTION_CHAR_COUNT_THRESHOLD) {
10587            return TEXT_DIRECTION_RTL;
10588        }
10589        return TEXT_DIRECTION_UNDEFINED;
10590    }
10591
10592    /**
10593     * Return true if the char direction is corresponding to a "strong RTL char" following the
10594     * Unicode Bidirectional Algorithm (UBA).
10595     */
10596    private static boolean isStrongRtlChar(final byte dir) {
10597        return (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT ||
10598                dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC);
10599    }
10600
10601    /**
10602     * Return true if the char direction is corresponding to a "strong LTR char" following the
10603     * Unicode Bidirectional Algorithm (UBA).
10604     */
10605    private static boolean isStrongLtrChar(final byte dir) {
10606        return (dir == Character.DIRECTIONALITY_LEFT_TO_RIGHT);
10607    }
10608
10609    /**
10610     * Subclasses will need to override this method to implement their own way of resolving
10611     * drawables depending on the layout direction.
10612     *
10613     * A call to the super method will be required from the subclasses implementation.
10614     *
10615     */
10616    protected void resolveDrawables() {
10617        // No need to resolve twice
10618        if (bResolvedDrawables) {
10619            return;
10620        }
10621        // No drawable to resolve
10622        if (mDrawables == null) {
10623            return;
10624        }
10625        // No relative drawable to resolve
10626        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
10627            bResolvedDrawables = true;
10628            return;
10629        }
10630
10631        Drawables dr = mDrawables;
10632        switch(getResolvedLayoutDirection()) {
10633            case LAYOUT_DIRECTION_RTL:
10634                if (dr.mDrawableStart != null) {
10635                    dr.mDrawableRight = dr.mDrawableStart;
10636
10637                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
10638                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
10639                }
10640                if (dr.mDrawableEnd != null) {
10641                    dr.mDrawableLeft = dr.mDrawableEnd;
10642
10643                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
10644                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
10645                }
10646                break;
10647
10648            case LAYOUT_DIRECTION_LTR:
10649            default:
10650                if (dr.mDrawableStart != null) {
10651                    dr.mDrawableLeft = dr.mDrawableStart;
10652
10653                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
10654                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
10655                }
10656                if (dr.mDrawableEnd != null) {
10657                    dr.mDrawableRight = dr.mDrawableEnd;
10658
10659                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
10660                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
10661                }
10662                break;
10663        }
10664        bResolvedDrawables = true;
10665    }
10666
10667    protected void resetResolvedDrawables() {
10668        bResolvedDrawables = false;
10669    }
10670
10671    @ViewDebug.ExportedProperty(category = "text")
10672    private CharSequence            mText;
10673    private CharSequence            mTransformed;
10674    private BufferType              mBufferType = BufferType.NORMAL;
10675
10676    private int                     mInputType = EditorInfo.TYPE_NULL;
10677    private CharSequence            mHint;
10678    private Layout                  mHintLayout;
10679
10680    private KeyListener             mInput;
10681
10682    private MovementMethod          mMovement;
10683    private TransformationMethod    mTransformation;
10684    private boolean                 mAllowTransformationLengthChange;
10685    private ChangeWatcher           mChangeWatcher;
10686
10687    private ArrayList<TextWatcher>  mListeners = null;
10688
10689    // display attributes
10690    private final TextPaint         mTextPaint;
10691    private boolean                 mUserSetTextScaleX;
10692    private final Paint             mHighlightPaint;
10693    private int                     mHighlightColor = 0xCC475925;
10694    /**
10695     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
10696     * this field being protected. Will be restored as private when lineHeight
10697     * feature request 3215097 is implemented
10698     * @hide
10699     */
10700    protected Layout                mLayout;
10701
10702    private long                    mShowCursor;
10703    private Blink                   mBlink;
10704    private boolean                 mCursorVisible = true;
10705
10706    // Cursor Controllers.
10707    private InsertionPointCursorController mInsertionPointCursorController;
10708    private SelectionModifierCursorController mSelectionModifierCursorController;
10709    private ActionMode              mSelectionActionMode;
10710    private boolean                 mInsertionControllerEnabled;
10711    private boolean                 mSelectionControllerEnabled;
10712    private boolean                 mInBatchEditControllers;
10713
10714    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
10715    // select from the current cursor position. Otherwise, select from long pressed position.
10716    private boolean                 mDPadCenterIsDown = false;
10717    private boolean                 mEnterKeyIsDown = false;
10718    private boolean                 mContextMenuTriggeredByKey = false;
10719    // Created once and shared by different CursorController helper methods.
10720    // Only one cursor controller is active at any time which prevent race conditions.
10721    private static Rect             sCursorControllerTempRect = new Rect();
10722
10723    private boolean                 mSelectAllOnFocus = false;
10724
10725    private int                     mGravity = Gravity.TOP | Gravity.START;
10726    private boolean                 mHorizontallyScrolling;
10727
10728    private int                     mAutoLinkMask;
10729    private boolean                 mLinksClickable = true;
10730
10731    private float                   mSpacingMult = 1;
10732    private float                   mSpacingAdd = 0;
10733    private boolean                 mTextIsSelectable = false;
10734
10735    private static final int        LINES = 1;
10736    private static final int        EMS = LINES;
10737    private static final int        PIXELS = 2;
10738
10739    private int                     mMaximum = Integer.MAX_VALUE;
10740    private int                     mMaxMode = LINES;
10741    private int                     mMinimum = 0;
10742    private int                     mMinMode = LINES;
10743
10744    private int                     mMaxWidth = Integer.MAX_VALUE;
10745    private int                     mMaxWidthMode = PIXELS;
10746    private int                     mMinWidth = 0;
10747    private int                     mMinWidthMode = PIXELS;
10748
10749    private boolean                 mSingleLine;
10750    private int                     mDesiredHeightAtMeasure = -1;
10751    private boolean                 mIncludePad = true;
10752
10753    // tmp primitives, so we don't alloc them on each draw
10754    private Path                    mHighlightPath;
10755    private boolean                 mHighlightPathBogus = true;
10756    private static final RectF      sTempRect = new RectF();
10757
10758    // XXX should be much larger
10759    private static final int        VERY_WIDE = 16384;
10760
10761    private static final int        BLINK = 500;
10762
10763    private static final int ANIMATED_SCROLL_GAP = 250;
10764    private long mLastScroll;
10765    private Scroller mScroller = null;
10766
10767    private BoringLayout.Metrics mBoring;
10768    private BoringLayout.Metrics mHintBoring;
10769
10770    private BoringLayout mSavedLayout, mSavedHintLayout;
10771
10772    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
10773    private InputFilter[] mFilters = NO_FILTERS;
10774    private static final Spanned EMPTY_SPANNED = new SpannedString("");
10775    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
10776    // System wide time for last cut or copy action.
10777    private static long sLastCutOrCopyTime;
10778    // Used to highlight a word when it is corrected by the IME
10779    private CorrectionHighlighter mCorrectionHighlighter;
10780    // New state used to change background based on whether this TextView is multiline.
10781    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
10782}
10783